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TRAIN-WAY > RL BIO 3 > Flashcards

RL BIO 3 Flashcards

1
Q

The vitamin that helps in blood clotting is:

A

VitaminK

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2
Q

●The vitamin that helps to prevent infections in thehuman body is:

A

Vitamin C

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3
Q

●The H5N1 virus which causes bird flu was firstdiscovered in:

A

1997

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4
Q

●Tetanus is caused by:

A

Clostridium

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5
Q

●Vitamin E is particularly important for:

A

Normalactivity of sex glands

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6
Q

●Blood pressure is controlled by:

A

Adrenal Gland

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7
Q

●The deficiency of Vitamin B causes:

A

Beriberi

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8
Q

●The expansion for AIDS is:

A

Acquired ImmunoDeficiency Syndrome

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9
Q

●Human cloning is permitted in Britain for thepurpose of:

A

Therapeutics

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10
Q

●Anaemia occurs due to the deficiency of:

A

Folic acid

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11
Q

●For a healthy heart, one needs to take a balanceddiet, adequate sleep and:

A

do right amount ofphysical exercise

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12
Q

●An ECG shows the functioning of the:

A

Heart

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13
Q

●If the radius of blood vessels of a person decreaseshis/her blood pressure will:

A

increase

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14
Q

●Cell or tissue death within a living body is called as:

A

Necrosis

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15
Q

●Insufficient blood supply in human body is referredas:

A

Ischema

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16
Q

●Typhoid is caused by:

A

Salmonella Typhi

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17
Q

●BCG immunization is for:

A

Tuberculosis

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18
Q

●The concentration decreases in anaemia?

A

Haemoglobin

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19
Q

●Which disease usually spreads through air?

A

Tuberculosis

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20
Q

●Small Pox is caused by:

A

Variola Virus

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21
Q

●Respiration process requires:

A

Oxygen

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22
Q

●A vitamin requires cobalt for its activity. The vitaminis:

A

Vitamin B12

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23
Q

●Ringworm is a which type of disease?

A

Fungaldisease

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24
Q

●The vitamin most readily destroyed by heat is:

A

Ascorbic acid

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25
Q

●The vector that transmits cholera is:

A

Housefly

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26
Q

●A drug which helps in controlling fever is:

A

Paracetamol

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27
Q

●The limb bones of children become bent if there isdeficiency of vitamin:

A

D

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28
Q

●A medicine which promotes the secretion of urine iscalled:

A

Diuretic

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29
Q

●Deamination occurs in liver to:

A

make use of excessamino acid

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30
Q

●Epithelial cells of intestine involved in foodabsorption have on their surface:

A

Microvilli

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31
Q

●Excessive intake of alcohol causes:

A

Liver cirrhosis

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32
Q

●Gastric juice contains:

A

Pepsin and HydrochloricAcid

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33
Q

●Hydrolytic enzymes occur in:

A

Lysosomes

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34
Q

●Carcinoma refers to:

A

Malignant tumours of theskin or mucous membrane

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35
Q

●Common cold is not cured by antibiotics because it is:

A

caused by a virus

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36
Q

●At which stage of HIV infection does one usuallyshow symptoms of AIDS?

A

When HIV replicatesrapidly in helper T-lymphocytes and damageslarge number of these

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37
Q

●Cancer cells are damaged by radiations while othersare not because cancer cells are:

A

Undergoingrapid divisions

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38
Q

●Alzheimer disease in humans is associated with thedeficiency of:

A

Acetylcholine

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39
Q

●Suspension of attenuated pathogen that stimulatesantibody formation is:

A

Vaccine

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40
Q

●Use of anti-histamines and steroids give a quick relieffrom:

A

Allergy

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41
Q

●Motile zygote of Plasmodium occurs in:

A

Gut offemale Anopheles

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42
Q

●Infectious proteins are present in:

A

Prions

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43
Q

●The pathogen Microsporum responsible forringworm disease in humans belongs to the sameKingdom of organisms as that of:

A

A mould

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44
Q

●Where will you look for the sporozoites of themalarial parasite?

A

Saliva of infected femaleAnopheles mosquito

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45
Q

●Goitre can occur as a consequence of all the followingexcept:

A

Excessive intake of exogenousthyroxine

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46
Q

●The immunoglobulin abundant in colostrums is:

A

IgA

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47
Q

●How many variable segments are present in the basicstructure of antibody molecules?

A

4

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48
Q

●Aedes aegypti is a vector for:

A

Both dengue andyellow fever

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49
Q

●To which type of barriers under innate immunity, dothe saliva in the mouth and the tears from the eyes, belong?

A

Physiological barriers

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50
Q

●Antigen binding site in an antibody is found between:

A

one heavy and one light chain

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51
Q

●The complexes formed during immune complexmediated hypersensitivity are removed by:

A

Eosinophils and Monocytes

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52
Q

●Antibodies in our body are complex:

A

Glycoproteins

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53
Q

●Cattle fed with spoilt hay to sweet clover whichcontains dicoumarol or dicumaro?

A

may suffervitamin K deficiency and prolonged bleeding

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54
Q

●Hemozoin is released into blood during the infectionof plasmodium vivax every:

A

48 hours

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55
Q

●Sickle cell anaemia has not been eliminated from theAfrican population because:

A

It providesimmunity against malaria

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56
Q

●Nobel prize for medicine was given for confirmingthe role of Helicobacter pylori in causing:

A

Peptic ulcer

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57
Q

●The letter T in T-lymphocyte refers to:

A

Thymus

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58
Q

●Increased asthmatic attacks in certain seasons arerelated to:

A

Inhalation of seasonal pollen

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59
Q

●The pathogen Microsporum responsible forringworm disease in humans belongs to the sameKingdom of organisms as that of:

A

A mould

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60
Q

●Where will you look for the sporozoites of themalarial parasite?

A

Saliva of infected femaleAnopheles mosquito

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61
Q

●Goitre can occur as a consequence of all the followingexcept:

A

Excessive intake of exogenous thyroxine

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62
Q

●Which Ig is produced in primary immune response?

A

IgM

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63
Q

●The causative agent of mad-cow disease is a:

A

Prion

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64
Q

●Less intake of which of the following vitamins cancause ‘Hyperkeratosis’?

A

Vitamin A

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65
Q

lEnterokinase converts:

A

Trypsinogen into trypsin

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66
Q

●In glycolysis ultimately:

A

glucose is converted intopyruric acid

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67
Q

●When breast feeding is replaced by less nutritive foodlow in proteins and calories; the infants below theage of one year are likely to suffer from:

A

Marasmus

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68
Q

●In the absence of enterokinase, the digestion of_______ would be affected in our intestine.

A

Albumin

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69
Q

●Which cells in liver act as phagocytes?

A

Kupffercells

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70
Q

●Keratinization of the skin is prevented by:

A

VitaminA

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71
Q

●Intestinal villi are mainly connected with:

A

Absorption

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72
Q

●Secretin stimulates production of

A

Pancreatic juice

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73
Q

●In duodenum the enzyme which breaks down starchto maltose is:

A

pancreatic amylase

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74
Q

●Lipase acts on:

A

Triglycerides

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75
Q

●Main difference between brown fat and white fat isthat the cells of brown fat

A

Have moremitochondria

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76
Q

●Oxyntic cells in stomach secrete:

A

Hydrochloricacid

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77
Q

●Peyer’s patches found in the small intestine are:

A

Lymphatic tissue

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78
Q

●Ptyalin is:

A

Slightly acidic

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79
Q

●Rickets can be prevented by taking:

A

Calciferol

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80
Q

●Seminal plasma in humans is rich in:

A

Fructose,calcium and certain enzymes

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81
Q

●Surgical removal of gall bladder in human beingswould lead to

A

Impairment of the digestion of fat

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82
Q

●Taste buds for bitter taste are found on tongue at:

A

posterior part

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83
Q

●The absorption of glycerol, fatty acids andmonoglycerides takes place by the:

A

Lymphvessels within the villi

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84
Q

●The catalytic efficiency of two different enzymes canbe compared by the:

A

Km value

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85
Q

●Name the substance which is not a product formed inthe small intestine?

A

Proteins

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86
Q

●The characteristics Brunner’s glands found induodenum secrete hormones

A

Secretin,cholecystokinin

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87
Q

●The first antibiotic was discovered by:

A

AlexanderFleming

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88
Q

●Ultrasound of how much frequency is beamed intohuman body for sonography?

A

1-15 MHz

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89
Q

●Hybridomas are the fusion product of:

A

normalantibody producing cell with myeloma

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90
Q

●An insect bite may result in inflammation of thatspot. This is triggered by the alarm chemicals suchas:

A

histamine and kinins

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91
Q

●Carcinoma refers to:

A

Malignant tumours of theskin or mucous membrane

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92
Q

●If you suspect deficiency of antibodies in a person, towhich of the following would you look forconfirmatory evidence?

A

Serum Globulins

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93
Q

●Electron beam therapy is a kind of radiation therapyto treat:

A

certain types of cancer

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94
Q

●The organism which causes pneumonia in humanbeings is:

A

Atrichous

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95
Q

●The antibody dependent cytotoxicity is seen in:

A

Non-compatible blood transfusion

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96
Q

●Which test is used to estimate the level of bloodalcohol by analyzing the breath of personsdrinking alcohol?

A

Dope Test

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97
Q

“●The term ““antibiotic”” was coined by:”

A

SelmanWaksman

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98
Q

●The incubation period of Hepatitis ‘B’ virus is:

A

30-180 days

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99
Q

●What is common to all types of diarrhoeal diseasesand adequate supply of fluids and electrolytesshould be ensured?

A

Dehydration

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100
Q

●A localized inflammatory response appears at the siteof infection causes redness, swelling, pain and heatdue to certain chemical, they are:

A

Histamineand prostaglandins

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101
Q

●Antivenom is used for the treatment of snake bite.The treatment of snake bite by antivenom is anexample of:

A

artificially acquired passiveimmunity

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102
Q

●A person likely to develop tetanus is immunized byadministering:

A

Preformed antibodies

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103
Q

●The phenomenon where tumour cells detach andmigrate to other parts of the body where they giverise to secondary tumours is called:

A

Metastasis

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104
Q

●Which cells in the human body release excessiveamounts of inflammatory chemicals, which causeallergic reactions?

A

Mast Cells

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105
Q

●Study of relationship of organisms to theirenvironment is :

A

Ecology

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106
Q

●All populations within an ecosystem interconnectedto one another are known as:

A

Community

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107
Q

●Major regional ecological community of plants andanimals forms:

A

Biomes

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108
Q

●The actual location or place where an organism livesis:

A

Habitat

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109
Q

●Two richest known sources of edible protein are:

A

Soyabean and groundnut

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110
Q

●Which are the largest fixator of solar energy?

A

Green Plants

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111
Q

●The carbon dioxide content in the air that we exhaleis about:

A

4%

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112
Q

●The role a species plays in a community includingbehavior and influence is:

A

Niche

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113
Q

●Study of a single population’s relationship to itsenvironment is called:

A

Autecology

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114
Q

●The biosphere covers about:

A

16-20 km

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115
Q

●Concept of ecological pyramids was proposed by:

A

Chlares Elton

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116
Q

●The term ‘Ecosystem’ was coined by:

A

Arthur G.Tansley

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117
Q

●Xeric environment is characterized by:

A

Lowatmospheric humidity

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118
Q

●Total amount of living material at the various trophiclevels of a food chain is depicted by pyramids of:

A

Biomass

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119
Q

●About 70% of total global carbon is found in:

A

Oceans

120
Q

●When the two ecosystems overlap each other, the areais called:

A

Ecotone

121
Q

●Which of the following statements about food chain iscorrect?

A

The length of food chains is generallylimited to 3 - 4 trophic levels due to energy loss

122
Q

●The tiny free-swimming animals on the surface ofwater constitute:

A

Zooplanklton

123
Q

●The biomass available for consumption by theherbivores and the decomposers is called:

A

Netprimary productivity

124
Q

Greenhouse effect is a:

A

natural phenomenon

125
Q

●In an area where DDT had been used extensively, thepopulation of birds declined significantly because:

A

Many of the birds eggs laid, did not hatch

126
Q

●Measuring Biochemical Oxygen Demand (BOD) is amethod used for:

A

Estimating the amount oforganic matter in sewage water

127
Q

●dB is a standard abbreviation used for thequantitative expression of:

A

A particularpollutant

128
Q

●Common indicator organism of water pollution is:

A

Escherichia coli

129
Q

●Industrial melanism is an example of:

A

Protectiveresemblance with the surrounding

130
Q

●Carbon dioxide is called green-house gas because itis:

A

Transparent to sunlight but traps heat

131
Q

●Trichoderma harzianum has proved a usefulmicroorganism for:

A

Bioremediation ofcontaminated soils

132
Q

●The two gases making highest relative contribution tothe greenhouse gases are:

A

CO2 and CH4

133
Q

●The slow rate of decomposition of fallen logs innature is due to their:

A

Poor nitrogen content

134
Q

●Transfer of energy in different trophic levels of anecosystem is called:

A

Bioenergetics

135
Q

●The species, though insignificant in number,determine the existence of many other species in agiven ecosystem. Such species is known as:

A

Keytone species

136
Q

●The nature’s cleaners are:

A

Decomposers andscavengers

137
Q

●DDT residues are rapidly passed through food chaincausing biomagnification because DDT is:

A

Liposoluble

138
Q

●The remains of the dead plants and animals is called:

A

detritus

139
Q

●How many bio-geographical regions are present inIndia?

A

10

140
Q

●Lime is added to the soil which is too:

A

acidic

141
Q

●Which one of the following has maximum geneticdiversity in India?

A

Mango

142
Q

●Darwin’s finches are a good example of:

A

Adaptiveradiation

143
Q

●The least porous soil among the following is a:

A

Clayey soil

144
Q

●Maximum nutritional diversity is found in the group:

A

Monera

145
Q

●Sacred groves are specially useful in:

A

Conservingrare and threatened species

146
Q

●The term Alpha diversity refers to:

A

Communityand ecosystem diversity

147
Q

●The percentage of forest cover recommended by theNational Forest policy (1988) was:

A

33% forplains and 67% for hills

148
Q

●Biodiversity of a geographical region represents:

A

The diversity in the organisms living in the region

149
Q

●Prolonged liberal irrigation of agricultural fields islikely to create the problem of:

A

Salinity

150
Q

●The greatest problem of water conservation is toreduce the amount of:

A

Runoff water

151
Q

●An inexhaustible non-conventional universal sourceof energy is:

A

Solar energy

152
Q

●Wild life conservation aims at:

A

Maintaining theecological process and the diversity of life

153
Q

●Plants like Aegle marmelos, Ocimum sanctum andFicus religiosa are a group of plants designated as:

A

Sacred species of plants

154
Q

●Sacred groves are specially useful in:

A

Conservingrare and threatened species

155
Q

●The 10% law for energy transfer in food chains wasgiven by:

A

Lindemann

156
Q

●Pyramid of energy in ecosystems is:

A

Alwaysupright

157
Q

●Savannahs are:

A

Grasslands with scattered trees

158
Q

●Sal (Shorea robusta) forest is a:

A

Deciduous Forest

159
Q

●Mass of living matter at a trophic level in an area atany time is called:

A

Standing Crop

160
Q

●Microbes that break down the complex organicmatter into simple substances like carbon,nitrogen, water etc. are:

A

Decomposers

161
Q

●The most recently discovered ecosystem is:

A

Vents

162
Q

●Most hazardous metal pollutant of the automobileexhaust is:

A

Lead

163
Q

●Ozone day is observed on:

A

16 September

164
Q

●Sulphur dioxide affects:

A

All membrane systems

165
Q

●Peeling of Ozone umbrella, which protects us fromUV rays, is caused by:

A

CFCs

166
Q

●Phosphate pollution is brought about by:

A

Fertilizers and sewage

167
Q

●Maximum threat to the world is from:

A

Ozone hole

168
Q

●Sound becomes a hazardous noise pollution if its levelis above:

A

80 dB

169
Q

●Pollutants having most lasting effect are:

A

Pesticides

170
Q

●Lead is one of the most serious environmentalpollutants which affects:

A

Soil

171
Q

●lf there was no CO2 in the atmosphere, the earth’stemperature would be:

A

Less than the present

172
Q

●Major aerosol pollutant present in the jet planeemission is:

A

Chlorofluorocarbon

173
Q

●Maximum deposition of DDT will occur in:

A

Seagull

174
Q

●The ultraviolet radiations in the stratosphere areabsorbed by:

A

Ozone

175
Q

●Minamata disease is due to pollution of:

A

Industrialwaste mercury into fishing water

176
Q

●Montreal Protocol aims at:

A

Reduction of ozonedepleting substances

177
Q

●Most abundant water pollutant is:

A

IndustrialWastes

178
Q

●Most harmful environmental pollutants are:

A

Nonbiodegradable chemicals

179
Q

●The atmosphere of big metropolitan cities is pollutedmost by:

A

Automobile exhausts

180
Q

●Gradual and predictable changes in the speciescomposition of a given area is:

A

Ecologicalsuccession

181
Q

●The maximum biomass occurs in

A

Tropical Forests

182
Q

●Animals living at the bottom of the sea are known as:

A

Benthic

183
Q

●The ecological pyramid which can be inverted in atree eco-system is:

A

Pyramid of Number

184
Q

●Energy flow in ecosystem is:

A

uni-directional

185
Q

●Which is the reason for highest biomass in aquaticecosystem?

A

Bethonic and Borwn algae

186
Q

●The average trophic efficiency of transfer of energyfrom one trophic level to the. higher trophic levelis called:

A

Linderman’s trophic efficiency rule

187
Q

●In a comparative study of grassland ecosystem andpond ecosystem, it may be observed that:

A

theabiotic components are almost similar

188
Q

●Biotic factors refer to:

A

Living organisms

189
Q

●In an ecosystem, the main source of energy is:

A

Solar Energy

190
Q

●Abiotic components include:

A

Atmosphere,Hydrosphere and Lithosphere

191
Q

●Sequence of changes in community and its non-livingenvironment over a period of time is:

A

Succession

192
Q

●Plants growing in xeric conditions are called:

A

Xerophytes

193
Q

●Lichen and algae form:

A

Pioneers community

194
Q

●Diverse and stable community at the end ofsuccession is:

A

Climax community

195
Q

●Secondary succession starts from:

A

From remains ofprevious ecosystem

196
Q

●Which term is used for Primary succession starting ina pond?

A

Hydrosere

197
Q

●Wood forests form the:

A

Climax community

198
Q

●Disease in living organisms caused by parasites iscalled:

A

Infestation

199
Q

●Legume plants are the hosts to:

A

Rhizobium

200
Q

●A dual organism composed of symbiotic associationof an alga living within a fungus myceliium is:

A

Lichen

201
Q

●Symbiosis relationship in which only one organism isbenefited is:

A

Commensalism

202
Q

●Sharks may have small fish attached to them called:

A

Remoras

203
Q

●Over grazing leads to:

A

Totally barren lands

204
Q

●Oxidation of ammonia or ammonium ions by bacteriain soil is called:

A

Nitrification

205
Q

●Gross primary production is:

A

Total amount ofenergy fixed by all plants

206
Q

●Plant biomass is:

A

Net primary production + Grossprimary production minus respiratory loss

207
Q

●Total solar energy trapped by the producers in anecosystem is:

A

1%

208
Q

●The major unit of ecology is:

A

Ecosystem

209
Q

Eco’ part of word ecosystem means

A

Environment

210
Q

●Contamination of water with sewage is indicated bycysts of:

A

Escherichia coli

211
Q

●Decomposition of domestic wastes under naturalprocesses is called:

A

Biodegradable pollution

212
Q

●Eutrophication causes decrease in:

A

Dissolvedoxygen

213
Q

●Eutrophication is often seen in

A

Fresh water lakes

214
Q

●Fish die in water polluted by sewage due to:

A

Reduction in O2

215
Q

●Fluoride pollution mainly affects:

A

Teeth

216
Q

●Gas leaked during Bhopal tragedy was:

A

Methylisocyanate

217
Q

●Global agreement in specific control strategies toreduce the release of ozone depleting substances,was adopted by:

A

The Montreal Protoco

218
Q

●Increase in the concentration of pollutants in highertrophic levels is known as:

A

Biomagnification

219
Q

●Process that supplies food to living things throughdecaying and decomposition is called:

A

Nutrientcycle

220
Q

●Balance in the nutrient cycle can be upset when:

A

Decayed nutrients are not returned to the ground

221
Q

●Endangered species are:

A

Reduced in number

222
Q

●What percentage of our energy requirements are metfrom fossil fuels?

A

95%

223
Q

●Driving force for all the cycles in ecosystem is:

A

Sun

224
Q

●Tides are caused by:

A

Gravitational pull of sun

225
Q

●Wind blows from area of:

A

High pressure to lowpressure

226
Q

●Hot substance is escaped from inside the earth in theform of:

A

Volcanoes, Hot Springs and Geysers

227
Q

●In oceans of tropical regions:

A

Temp of surfacewater is 25 degree C and 5 degree C at depth

228
Q

●The study of human population and things that affectthem is:

A

Demography

229
Q

●Replantation of plants in the areas where they werepresent earlier is called:

A

Reforestation

230
Q

●Establishment of new forests where no forests existedpreviously is called:

A

Afforestation

231
Q

●About half of the rain which falls in tropical forestscomes from:

A

Transpiration of plants

232
Q

●Short-term fluctuations in temperature, cloud cover,wind and precipitation is known as:

A

Weather

233
Q

●Diseases caused by UV rays in humans:

A

Cataractsand Night Blindness

234
Q

●Sun rays are reradiated from the earth’s surface inthe form of:

A

Long wave radiations

235
Q

●Incomplete burning of carbon compounds causerelease of:

A

Carbon monoxide

236
Q

●Algal bloom is also called as:

A

Eutrophication

237
Q

●The chemical wastes from industry is called:

A

Industrial effluents

238
Q

●Pesticides and fertilizers are also called:

A

Agrochemicals

239
Q

●Which are more susceptible to attacks of pests?

A

Monocultures

240
Q

●Coniferous forests located at high altitude are called:

A

Alpine

241
Q

●Northern coniferous forests are called:

A

Taiga

242
Q

●Temperature of temperate deciduous forests is:

A

4-30 degree celsius

243
Q

●Productivity of an ecosystem is indicated by:

A

Number of plants in that ecosystem and thedensity of that ecosystem

244
Q

●Competition is severe in a population that has adistribution which is:

A

Irregular

245
Q

●A disease affecting industrial workers is:

A

Silicosis

246
Q

●BOD of a pond is related to ______ in per unitvolume of water.

A

All the microbes

247
Q

●In a population, if the rate of addition of newmembers is higher than the rate of individualslost, it shows:

A

Exponential Growth

248
Q

●Addition of phosphates and nitra-tes/fertilizers intowater leads to:

A

Nutrient enrichment(eutrophication)

249
Q

●Attack of asthma in certain persons may be due to:

A

Inhalation of some air borne pollen

250
Q

●Biochemical Oxygen Demand (BOD) in a river water:

A

Increases when sewage gets mixed with river water

251
Q

●BOD is connected with:

A

Microbes and organicmatter

252
Q

●Carbon monoxide is a pollutant because it:

A

Reactswith hemoglobin

253
Q

●As it travels along the food chain, the concentrationof DDT:

A

Increases

254
Q

●A chemical harmful released by Chlorofluorocarbonto ozone is:

A

Chlorine

255
Q

●CO emitted by automobiles prevents O-transport tobody tissues by:

A

Forming a stable compoundwith hemoglobin

256
Q

●In an ecosystem Biotic factors affect the survival ofan organism in that ecosystem. They include:

A

competition for food and water and competitionfor shelter

257
Q

●Plant succession occurring in a sandy area is:

A

Psammosere

258
Q

●The maximum amount of water that a soil can hold,by capillary action is called:

A

Field capacity

259
Q

●In ecological succession from pioneer to climaxcommunity, the biomass shell:

A

Increasecontinuously

260
Q

●Individuals of a species which occur in a particulararea constitute:

A

Population

261
Q

●The role of an organism in the ecological system isknown as:

A

Interaction

262
Q

●Information about birth rate, death rate, sex ratio,age distribution etc. of a population is obtainedfrom:

A

Life Table

263
Q

●Insectivorous plants are adopted to soils:

A

Deficientin nitrogenous compounds

264
Q

●Large Woody Vines are more commonly found in:

A

Tropical Rainforests

265
Q

●Organisms that can tolerate and thrive in a widerange of temperatures are called:

A

Eurythermal

266
Q

●The correct statement is:

A

Tropical rain forests aredisappearing fast from developing countries suchas India

267
Q

●Deserts, grasslands, forests and tundra are theexamples of:

A

Biomes

268
Q

●Plant species having a wide range of geneticaldistribution evolve into a local population knownas:

A

Ecotype

269
Q

●The Place where organism lives and performs its dutyis known as:

A

Niche

270
Q

●The rate of formation of new organic matter byrabbit in a grassland, is called

A

SecondaryProductivity

271
Q

●The upright pyramid of number is absent in:

A

Forest

272
Q

●The type of ecosystem with the highest mean plantproductivity is:

A

Tropical Rain forest

273
Q

●In an aquatic ecosystem, the trophic level equivalentto cows in grasslands is:

A

Zooplankton

274
Q

●Bell-shaped polygonal pyramid indicates:

A

Moderate percentage of young individuals

275
Q

●The age of pyramid with broad base indicates:

A

High percentage of young individuals

276
Q

●Eutrophication is:

A

Adequate nutrition acceleratedby human activities

277
Q

●In polluted lake which organisms dominate thecommunity:

A

Blue green algae

278
Q

●Grass land in tropic climates with woody trees iscalled:

A

Savanna

279
Q

●Evolution of vascular bundles in plants and skeletonin animals is an adaptation for:

A

Terrestrialecosystem

280
Q

●Development of bark in plants and skin in animals isa method for:

A

Reducing water loss

281
Q

●Zone of lake water which is of open water near thesurface is:

A

Limnetic

282
Q

●Mountains of Koh Hindukush come under:

A

Tundra

283
Q

●End of earth’ is related to:

A

Tundra

284
Q

●The Species structure and diversity index of an area,biomass and Autotrophic and heterotrophiccomponents constitute:

A

Community

285
Q

●Which factor of ecosystem includes plants, animalsand microorganisms?

A

Biotic factors

286
Q

●A population with equal number of births and deathswill show:

A

Plateau phase

287
Q

●A terrestrial animal must be able to:

A

Conservewater

288
Q

●Adaptation to low temperature and freezing inanimals occurs due to the production of:

A

Antifreeze

289
Q

●An association of individuals of different speciesliving in the same habitat and having functionalinteractions is:

A

Biotic community

290
Q

Animals that have adapted themselves to live in desertsare known as:

A

Xerocoles

291
Q

●Association between sea Anemone and Hermit crabin gastropod shell is that of:

A

Commensalism

292
Q

●Biotic potential is increase in population under:

A

Optimum conditions

293
Q

●CAM helps the plants in:

A

conserving water

294
Q

●The abundance of a species population within itshabitat is called:

A

Niche density

295
Q

●Competition is most severe between two:

A

Closelyrelated species growing in the same habitat

296
Q

●When one animal copies the appearance, actions, orsounds of another animal to avoid predators, it iscalled:

A

Mimicry

TRAIN-WAY (27 decks)

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