Biology Flashcards

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1
Q

What is the definition of a species?

A

A species is a group of living organisms that are able to interbreed and produce fertile offspring

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2
Q

What is the definition of an ecosystem?

A

An ecosystem consists of all the organisms living in a particular habitat and the non-living components with which the organisms interact

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3
Q

What is the definition of a habitat?

A

The place where an organism lives

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4
Q

What is a population?

A

All of the organisms of the same type living in the same place

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5
Q

What is a community?

A

A group of organisms of different species living in the same place and interacting

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6
Q

What is a niche?

A

The role an organism plays in

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7
Q

What is inTERspecific competition?

A

InTERspecific competition is when individuals of DIFFERENT species require one or few of the same resources

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8
Q

What is InTRAspecific competition?

A

InTRAspecific competition is when individuals of the SAME species fight for one or few of the same resources

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9
Q

What are BIOTIC FACTORS

A

Living factors such as disease, grazing and prey

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10
Q

What are ABIOTIC factors

A

Non living factors like light, temperature and pH

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11
Q

What is an indicator species?

A

Indicator species are species that by their presence or absence indicate environment quality or levels of pollution.

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12
Q

What is photosynthesis?

A

Photosynthesis is a series of enzyme controlled reactions which allow green plants to make glucose using light energy

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13
Q

What is the chemical equation for photosynthesis?

A

CO2 + H2O —> C6 H12 O6 + O2

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14
Q

What are raw materials for photosynthesis?

A

Carbon dioxide and water.

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15
Q

What are Essential elements for photosynthesis?

A

Light energy and chlorophyll

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16
Q

What are photosynthesis products?

A

Glucose and oxygen

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17
Q

What is the first and second stage of photosynthesis?

A

FIRST STAGE: Light Reactions

SECOND STAGE: Carbon Fixation

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18
Q

What are photosynthesis limiting factors?

A

Temperature
Light intensity
CO2 concentration

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19
Q

What and a plant do with glucose?

A

It can convert glucose into starch for storage of energy and it can be converted into cellulose for immediate energy.

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20
Q

What is the first thing of a food chain?

A

Producers, they trap light energy from the sun and maintain life on earth

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21
Q

What is a decomposer?

A

An organism that decomposes organic material.

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22
Q

What does each arrow in the food chain represent?

A

Each arrow in the food chain represents the direction of energy flow.

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23
Q

Where does 90% of energy from food go?

A

Heat Undigested Material Movement

24
Q

How is bioaccumulation caused?

A

Bioaccumulation is caused by pesticides being built up in living organisms

25
Q

What produce amino acids in plants?

A

Nitrates

26
Q

What is biological control?

A

Biological control is the control of the structure of a gene.

27
Q

What is Speciation?

A

Speciation is the formation of a new species.

28
Q

What molecules can diffuse through cell membranes?

A

Small, soluble ones like salt and glucose.

29
Q

Where is the site of protein synthesis?

A

The ribosome

30
Q

Where is the site of photosynthesis?

A

The chloroplasts

31
Q

Where is the site of aerobic respiration?

A

The Mitochondria

32
Q

How does glucose, oxygen and amino acids move into the cell?

A

From a high to a low concentration

33
Q

How does carbon dioxide move out of the cell?

A

From a high to low concentration

34
Q

What is Osmosis?

A

Osmosis is the movement of water molecules from a high to low concentration gradient through a selectively permeable membrane.

35
Q

What does passive mean?

A

It mean something does not require energy

36
Q

Explain Turgid

A

Water moves inside the cell, and the vacuole swells, cell membrane pushes against cell wall, ONLY IN PLANT CELLS

37
Q

Explain Plasmolysed

A

Water moves out of the cell membrane, and moves away from the cell wall and the vacuole shrinks - ONLY IN PLANT CELLS

38
Q

What concentration does Diffusion go from

A

Diffusion goes from a high to low concentration and does not require energy

39
Q

What concentration does active transport go from?

A

Active goes from a low to high concentration and does require energy

40
Q

What does Adenine pair with?

A

Thymine

41
Q

What does Cytosine pair with?

A

Guanine

42
Q

What is a gene?

A

A Gene is a section of DNA that codes for specific protein.

43
Q

What is mRNA?

A

mRNA is a molecule which carries a complementary copy of the genetic code from the DNA in the nucleus to a ribosome.

44
Q

What is BAP?

A

The Order of Bases - determines sequence of amino acids to form a protein

45
Q

Name all the types of protein

A

Hormonal, Antibody, Receptor and Enzyme

46
Q

What are enzymes?

A

Enzymes are biological catalysts that are proteins made by all living cells.

47
Q

What does catalase breakdown?

A

Catalase breaks down hydrogen peroxide to make water and oxygen

48
Q

What is degradation

A

Degradation is when large molecules are broken down into smaller molecules

49
Q

What is starch broken down into?

A

Starch is broken down into amylase to produce maltose

50
Q

What is synthesis? (Not photo)

A

Synthesis is when small simple molecules are joined together to make a large complex molecule.

51
Q

What does phosphorylase make?

A

Starch molecules

52
Q

Describe genetic engineering

A

Enzymes cut the required gene from the chromosome, to cut the bacterial plasmid and to seal the newly inserted gene into the plasmid

53
Q

In Fermentation, what is glucose broken down into in animal cells?

A

Pyruvate, then lactate

54
Q

In Fermentation, what is glucose broken down into in plant and yeast cells?

A

Pyruvate, then ethanol and carbon dioxide

55
Q

Where does aerobic respiration start and end?

A

Aerobic respiration starts in cytoplasm and ends in the mitochondria