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Biology (NCERT) - Class XI > XI Chap 4 Animal Kingdom > Flashcards

XI Chap 4 Animal Kingdom Flashcards

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1
Q

How many species of animals have been described until now?

A

Over a million

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2
Q

What are the features at the basis of animal classification?

A
  1. Arrangement of cells / levels of organization
  2. Body symmetry
  3. Nature of coelom
  4. Patterns of digestive, circulatory or reproductive systems

(Diplo/Triploblastic, Segmentation, Presence of Notochord)

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3
Q

All members of Animalia are multicellular and exhibit the same pattern of organisation of cells. T or F?

A

False, first half is true, but they have different patterns of organisation

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4
Q

Match the following levels of organization:

Platyhelminthes and Aschelminthes
Annelids, Arthropods, Molluscs, Echinoderms and Chordates
Sponges
Coelenterates & Ctenophora

[Cell - Tissue - Organ - Organ System]

A

Platyhelminthes and Aschelminthes - ORGAN
Annelids, Arthropods, Molluscs, Echinoderms and Chordates - ORGAN SYSTEM
Sponges - CELL
Coelenterates & Ctenophora - TISSUE

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5
Q

Digestive system in Platyhelminthes has how many openings? What kind of digestive system is this?

A

One, incomplete

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6
Q

A complete digestive system has ____ openings

A

2, mouth and anus

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7
Q

Open v. closed circulatory system

A

Open - blood pumped out of heart and cells/tissues are directly bathed in it
Closed - blood is circulated through a series of vessels of varying diameters (arteries, veins and capillaries)

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8
Q

Sponges are mostly _____________

[radially symmetrical, bilaterally symmetrical, asymmetrical]

A

asymmetrical

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9
Q

Define radial symmetry

A

Any plane - central axis of body - 2 identical halves

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10
Q

What phyla demonstrate radial symmetry?

A

Coelenterates, ctenophores and echinoderms

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11
Q

Define bilateral symmetry

A

central axis of body - 2 identical halves - ONLY ONE plane

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12
Q

What phyla demonstrate bilateral symmetry?

A

Platyhelminthes and higher

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13
Q

Diploblastic v. Triploblastic organization?

A

Diploblastic - 2 embryonic layers, external ectoderm and internal endoderm

Triploblastic - third germinal layer, mesoderm, in between ecto and endoderm

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14
Q

Diploblastic animals have an undifferentiated layer, mesoglea, in between the ectoderm and the endoderm. T or F?

A

True

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15
Q

___________ are diploblastic whereas _____________ are triploblastic

A

Coelenterates and Ctenophora - diploblastic

Platyhelminthes and above - triploblastic

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16
Q

What is coelom?

A

Body cavity between the body wall and gut wall lined by mesoderm

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17
Q

Animals possessing coelom are called _____________

A

coelomates

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18
Q

Which animals are acoelomates, pseudocoelomates and coelomates?

A

Porifera to Platyhelminthes - acoelomates
Aschelminthes - pseudocoelomates
Annelids and higher - coelomates

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19
Q

What are pseudocoelomates?

A

Animals in which mesoderm is present not as a continuous lining but in scattered pouches between ectoderm and endoderm

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20
Q

What is metamerism?

A

Body is externally and internally divided into segments,
serial repetition of at least SOME organs

e.g. earthworm

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21
Q

What is notochord?

A

Mesodermally-derived rod-like structure formed on dorsal side during embryonic development in some animals

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22
Q

Members of phylum porifera are commonly known as _________

A

sponges

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23
Q

Sponges are generally _________ (freshwater / marine) and mostly _________ (symmetrical / asymmetrical)

A

marine, asymmetrical

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24
Q

Phylum _________ are primitive multicellular animals

A

Porifera

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25
Q

Porifera have _________ level of organization

A

cellular

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26
Q

Sponges have a water transport or canal system. Water enters through _________ in the body wall into the _________ from where it goes out through the _________

A

ostia (minute pores)
spongocoel (central cavity)
osculum

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27
Q

Pathway of water transport in Porifera is helpful in _________, _________ and _________

A

food gathering, respiratory exchange and removal of waste

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28
Q

What are choanocytes?

A

Collar cells that line the spongocoel and the canals in PORIFERA

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29
Q

Digestion in porifera is _________

A

intracellular

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30
Q

Body of sponges is supported by a skeleton made up of _________ or _________

A

spicules or spongin fibres

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31
Q

Porifera sexes are _________ (separate / not separate)

A

not separate (hermaphrodite)

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32
Q

Sponges reproduce asexually by _________ and sexually by _________

A

fragmentation, gamete formation

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33
Q

In sponges, fertilisation is _________ and development is _________

A 
internal
indirect (larval stage)
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34
Q

Classify into the correct phylum / sub-phylum:

Ophiura
Hirudinaria
Ascidia
Limulus
Asterias
Pleurobrachia
Meandrina
Antedon
Fasciola
Culex
Anopheles
Chaetopleura
Gorgonia
Sycon
Dentalium
Echinus
Aplysia
Bombyx
Taenia
Pennatula
Branchiostoma
Octopus
Laccifer
Pheretima
Aedes
Sepia
Ctenoplana
Ancylostoma
Pinctada
Spongilla
Adamsia
Doliolum
Euspongia
Balanoglossus
Locusta
Loligo
Cucumaria
Salpa
Wuchereria
Physalia
Ascaris
Apis
Saccoglossus
Pila
A
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35
Q

Match to the correct common name:

A
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36
Q

Coelenterates are aka _________ which is derived from the _________ or _________ present on the tentacles and the body

A

cnidaria, cnidoblasts, cnidocytes, tentacles

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37
Q

Cnidoblasts / Cnidocytes contain the _________

A

stinging capsules aka nematocysts

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38
Q

Coelenterates are aquatic, mostly _________ (fresh water / marine)

A

marine

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39
Q

Cnidoblasts are used by coelenterates for _________, _________ and _________

A

anchorage, defense and capture of prey

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40
Q

Cnidaria exhibit _________ level of organisation and are _________ (diplo/triploblastic)

A

tissue, diploblastic

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41
Q

Coelenterates have a _________ gastro-vascular cavity with a single opening, mouth, on _________

A

central, hypostome

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42
Q

Digestion in coelenterates is _________

A

extracellular and intracellular

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43
Q

Corals (cnidarians) have a skeleton composed of _________

A

calcium carbonate

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44
Q

Cnidarians have 2 basic body forms. They are?

A

Polyp and Medusa

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45
Q

Polyps are _________ and _________ whereas medusa are _________ and _________

umbrella-shaped, cylindrical, sessile, free-swimming

A

Polyps - sessile, cylindrical

Medusa - umbrella, free-swimming

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46
Q

Examples of polyps and medusa coelenterates?

A

Polyp - Hydra, Adamsia, Obelia

Medusa - Aurelia, jelly fish

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47
Q

What is metagenesis? e.g.

A

Cnidarians can exist in alternating forms of medusa polyp, alternating by generation
e.g. Obelia

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48
Q

In metagenesis, polyps produce medusae _________ and medusae form polyps _________

A

asexually, sexually

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49
Q

Ctenophores are commonly known as _________ or _________

A

sea walnuts, comb jellies

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50
Q

______________ are exclusively marine

A

Ctenophores

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51
Q

Ctenophores:

Symmetry, -blastic and level of organization ?

A

Radially symmetrical,
diploblastic,
tissue level of organization

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52
Q

Ctenophore body bears _______ (how many?) external rows of ciliated _________ which help with locomotion

A

8, comb plates

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53
Q

Digestion in ctenophores?

A

Intracellular and extracellular

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54
Q

What is bioluminescence? In what animals do we see it?

A

Property of living organism to emit light

Ctenophores

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55
Q

Sexes in ctenophores are _________ (separate / not separate)

A

Not separate (hermaphrodites)

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56
Q

Reproduction in ctenophores takes place only by _________ (asexual or sexual) means.

A

Sexual

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57
Q

Fertilization and development in ctenophores?

A

External,

Indirect

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58
Q

Platyhelminthes have a _________ body and hence are called flatworms

A

dorso-ventrally flattened

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59
Q

_________ are mostly endoparasites found in animals including humans

A

Platyhelminthes

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60
Q

Symmetry, -blastic, coelom, level of organisation in platyhelminthes?

A

Bilaterally, triploblastic, acoelomate, organ level of organization

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61
Q

_________ and _________ (platyhelminthes) are present in parasitic forms

A

Hookers, suckers

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62
Q

Specialised cells called _________ cells help in osmoregulation and excretion in flatworms.

A

flame

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63
Q

Sexes are _________ in platyhelminthes?

A

not separate (hermaphrodites)

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64
Q

In platyhelminthes,

Fertilisation is _________ and development is _________

A

internal, indirect (many larval stages)

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65
Q

Some Platyhelminthes members like _________ possess high regeneration capacity

A

Planaria

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66
Q

Body of aschelminthes is _________ shape in cross-section hence the name _________

A

circular, roundworms

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67
Q

Match the correct ones to roundworms:

free-living, parasitic, aquatic, terrestrial

A

ALL of them!

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68
Q

Aschelminthes:

Symmetry, -blastic, coelom and level of organisation

A

Bilaterally symmetrical,
triploblastic,
pseudocoelomate
organ-system level

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69
Q

Alimentary canal of aschelminthes is _________ (complete / incomplete) with a _________ (underdeveloped / well-developed) muscular pharynx

A

complete, well-developed

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70
Q

_________ removes body wastes from the body of aschelminthes through the _________

A

Excretory tube, excretory pore

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71
Q

Aschelminthes:

Sexes are _________

A

separate (dioecious)

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72
Q

Often, male roundworms are longer than females. T or F?

A

False, other way around

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73
Q

Aschelminthes:

Fertilisation is _________ and development is _________

A

internal,

direct or indirect

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74
Q

Match the correct ones to annelids:

free-living, parasitic, aquatic, terrestrial

A

ALL of them!

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75
Q

Annelida:

Symmetry, -blastic, coelom and level of organisation

A

Bilateral, triploblastic, coelomate, organ-system

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76
Q

Body surface of annelids are marked out into _________ aka _________ and hence the phylum name which means _________ in Latin

A

segments, metameres, little ring

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77
Q

Annelids possess _________ and _________ muscles that help in locomotion

A

longitudinal and circular

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78
Q

Aquatic annelids like _________ possess lateral appendages called _________ which help in swimming

A

Nereis, parapodia

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79
Q

Circulatory system in annelids is _________

A

closed

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80
Q

_________ in annelids help in osmoregulation and excretion

A

Nephridia

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81
Q

Neural system of annelida consists of ….

A

paired ganglia connected by lateral nerves to a double ventral nerve cord

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82
Q

Sexes of annelids?

A

Nereis - dioecious (separate)

Earthworms and leeches - monoecious (hermaphrodite, not separate)

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83
Q

Reproduction in annelida is _________ (sexual or asexual)

A

Sexual

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84
Q

_________ is the largest phylum of Animalia and _________ is the second largest

A

Arthropoda, Mollusca

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85
Q

Over _________ of all named species on earth are arthropods

A

2/3

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86
Q

Arthropoda:

Symmetry, -blastic, coelom and level of organisation

A

Bilaterally symm, triploblastic, coelomate and organ-system level

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87
Q

Arthropoda, like annelids, are segmented animals. T or F?

A

True

88
Q

Body of arthropods is covered by __________

A

chitinous exoskeleton

89
Q

Body of arthropoda consists of 3 parts:

A

head, thorax, abdomen

90
Q

Arthropoda literally means __________

A

arthros - join

poda - appendages

91
Q

Respiratory organs of arthropoda are __________

A

gills, book gills, book lungs or tracheal system

92
Q

Circulatory system of arthropoda is _________

A

open

93
Q

Sensory organs like _______ are present in arthropoda

A

antennae,
eyes (simple and compound),
statocysts / balancing organs

94
Q

Excretion in arthropods takes place through ____________

A

Malphigian tubules

95
Q

Sexes in arthropods?

A

Dioecious (mostly) i.e. separate sexes

96
Q

Arthropods:

Fertilization is usually _________ and development is _________

A

internal,

direct or indirect

97
Q

Arthropods are exclusively oviparous. T or F?

A

False, mostly oviparous

98
Q

Economically important insects? (3)

A

Apis, Bombyx, Laccifer

99
Q

Vector insects? (3)

A

Anopheles, Culex, Aedes

100
Q

Gregarious pest insect? (1)

A

Locusta

101
Q

Living fossil insect? (1)

A

Limulus

102
Q

Molluscs are terrestrial, aquatic or either?

A

Either

103
Q

Molluscs:

Symmetry, -blastic, coelom and level of organisation

A

Bilateral, triploblastic, coelomate, organ-system

104
Q

Body of mollusca is covered by __________ and is __________ (unsegmented/segmented)

A

calcareous shell, unsegmented

105
Q

Body of mollusca has 3 distinct parts:

A

head, muscular foot and visceral hump

106
Q

A soft and spongy layer of skin forms a mantle over the _________ in the body of a mollusc

A

visceral hump

107
Q

Space between the hump and mantle in molluscs is called the _________ in which feather-like _________ are present

A

mantle cavity, gills

108
Q

The _________ head region of molluscs has sensory tentacles

A

anterior

109
Q

What is a radula?

A

A file-like rasping organ for feeding in the mouth of a mollusc

110
Q

Sexes in mollusca?
Ovi / viviparous?
Development?

A

Dioecious (separate), oviparous, indirect

111
Q

Echinodermata have _________ (endoskeleton/exoskeleton) of calcareous ossicles

A

endoskeleton

112
Q

The name echinodermata means ____________

A

spiny bodied

113
Q

All echinodermata are ____________ (fresh water, marine, terrestrial)

A

marine

114
Q

Echinoderms:

Symmetry, -blastic, coelom and level of organization?

A

Radially (adult) and larvae (bilateral), triploblastic, coelomate, organ-system level

115
Q

Digestive system of echinoderms is complete with mouth on ____________ side and anus on ____________ side

A

lower (ventral)

upper (dorsal)

116
Q

Most distinctive feature of echinoderms is ____________

A

the presence of water vascular system which helps in locomotion, capture and transport of food, and respiration

117
Q

Excretory system of echinoderms is ____________

A

absent

118
Q

Echinoderms:
Sexes? Reproduction?
Fertilization and development?

A

Sexes - separate (dioecious)
Reproduction - sexual
Fertilization - external
Development - indirect with free-swimming larva

119
Q

____________ was earlier considered as a sub-phylum under Chordata

A

Hemi-chordata

120
Q

Hemicordates have a rudimentary structure in the collar region called the ____________

A

stomochord

121
Q

Hemichordata consists of a small group of _____-like marine animals

A

worm

122
Q

Hemichordata:

Symmetry, -blastic, coelom and level of organisation?

A

Bilaterally, triploblastic, coelomate and organ-system level

123
Q

Body of hemichordates is ____________ in shape and is composed of ____________, ____________ and ____________

A

cylindrical,
anterior proboscis,
collar,
long trunk

124
Q

Circulatory system of hemichordates is ____________

A

open

125
Q

Respiration takes place in hemichordates through ____________

A

gills

126
Q

Excretory organ of hemichordates is ____________

A

proboscis gland

127
Q

Hemichordates:
Sexes?
Fertilization?
Development?

A

Separate (dioecious)
External
Indirect

128
Q

Animals belonging to phylum Chordata are fundamentally characterised by present of ____________, ____________ and ____________

A

notochord, dorsal hollow nerve cord and paired pharyngeal gill slits

129
Q

Chordata:

Symmetry, -blastic, coelom and level of organisation?

A

Bilaterally, triploblastic, coelomate, organ-system level

130
Q

Chordates possess a ____________ tail

A

post-anal

131
Q

Chordates possess a ____________ circulatory system

A

closed

132
Q

Chordates v. Non-chordates

A

Chordates:

  1. notochord
  2. CNS - dorsal, hollow and single
  3. pharyngeal gill slits
  4. ventral heart
  5. post-anal tail

Non-chordates:
1. CNS - ventral, solid and double
2. Heart is dorsal (if present)
Rest absent

133
Q

Chordata is divided into 3 subphyla:

A
  1. Urochordata/Tunicata
  2. Cephalochordata
  3. Vertebrata
134
Q

What are protochordates?

A

Urochordata and Cephalochordata

135
Q

Protochordates are exclusively fresh water. T or F?

A

False, exclusively marine

136
Q

In ____________, notochord is present only in larval tail while in ____________, it extends from head to tail region and is persistent for life.

A

Urochordata, Cephalochordata

137
Q

____________ possess notochord during embryonic period

A

Vertebrata

138
Q

Notochord is replaced by ____________ in the adult

A

cartilaginous or bony vertebral column

139
Q

Vertebrates have a ventral muscular heart with ____________ chambers, ____________ for excretion and osmoregulation and paired appendages which may be ____________ or ____________

A

2/3/4
kidneys
fins or limbs

140
Q

What are the divisions under subphylum Vertebrata?

A

Agnatha (lacks jaw)

Gnathostomata (bears jaw)

141
Q

What are the Classes under the Agnatha division?

A

Cyclostomata

142
Q

Gnathostomata is divided into how many classes? What are they?

A

Pisces (bears fins)

Tetrapoda (bears limbs)

143
Q

What are the classes under Pisces?

A

Chondrichthyes

Osteichthyes

144
Q

What are the classes under Tetrapoda?

A
  1. Amphibia
  2. Reptilia
  3. Aves
  4. Mammals
145
Q

All living members of the class Cyclostomata are endoparasites on some fishes. T or F?

A

False, ectoparasites

146
Q

Cyclostomata have a ____________ body bearing ____________ pairs of gill slits for respiration

A

elongated, 6-15 pairs

147
Q

Cyclostomes have a ____________ mouth without jaws

A

sucking and circular

148
Q

Cyclostome body is devoid of ____________ and ____________

A

scales and paired fins

149
Q

Cranium and vertebral column of cyclostomes is ____________

A

cartilaginous

150
Q

Circulation in cyclostomata is of ____________ type

A

closed

151
Q

Cyclostomes are ____________ (freshwater / marine)

A

marine, but migrate to fresh water for spawning

152
Q

After spawning, cyclostomes ____________. The larvae undergo ____________ and ____________

A

die within a few days,
metamorphosis
return to the ocean

153
Q

Chondrichthyes are ____________ (freshwater / marine) with ____________ body and ____________ endoskeleton

A

marine,
streamlined,
cartilaginous

154
Q

On chondrichthyes, mouth is located ____________ (dorsally or ventrally)

A

ventrally

155
Q

Notochord is persistent throughout life in chondrichthyes. T or F?

A

True

156
Q

In chondrichthyes, gill slits are __________ and without __________

A

separate, operculum (gill cover)

157
Q

Skin of chondrichthyes is tough, containing minute __________

A

placoid scales

158
Q

Teeth of chondrichthyes are modified __________ which are backwardly directed.

A

Placoid scales

159
Q

Jaws of chondrichthyes are __________ (weak / powerful)

A

Powerful

160
Q

Chondrichthyes are __________ (parasites / predators)

A

predators

161
Q

Due to absence of __________ chondrichthyes have to swim constantly to avoid sinking

A

air bladder

162
Q

Chonrichthyes heart is ____-chambered

A

two (one auricle and one ventricle)

163
Q

Some chondrichthyes possess electric organs like __________ whereas some possess poison sting like __________

A

Torpedo, Trygon

164
Q

Chonrichthyes are __________ (cold / hot blooded)

A

cold-blooded (poikilothermous)

165
Q

Sexes of chondrichthyes are __________

Fertilisation? Development? Ovi/Vivi?

A

separate
internal
indirect
viviparous

166
Q

In male chondrichthyes, pelvic fins bear __________

A

claspers

167
Q

Osteichthyes are __________ (freshwater / marine) with __________ endoskeleton

A

both, bony

168
Q

Body of osteichthyes is __________ and mouth is mostly __________

A

streamlined, terminal

169
Q

Osteichthyes have _____ (how many?) pairs of gills which are covered by an __________ on each side

A

4, operculum

170
Q

Skin of osteichthyes is covered with __________ scales

A

cycloid/ctenoid

171
Q

Air bladder is absent in osteichthyes. T or F?

A

False it is present

172
Q

Osteichthyes,

Heart is _____-chambered and they are __________ (cold/warm blooded)

A

2, cold-blooded

173
Q 
Osteichthyes:
Sexes? 
Fertilisation? 
Development?
Ovi/Vivi?
A

Separate,
External
Direct
Oviparous

174
Q 
Classify into the correct Vertebrata class:
Macropus
Naja
Pterophyllum
Pteropus
Scoliodon
Vipera
Corvus
Neophron
Ornithorhynchus
Camelus
Ichthyophis
Bangarus
Macaca
Exocoetus
Petromyzon
Rattus
Canis
Betta
Aptenodytes
Pristis
Myxines
Hyla
Felis
Testudo
Chelone
Elephas
Salamandra
Pavo
Clarias
Equus
Struthio
Catla
Crocodilus
Carcharodon
Delphinus
Labeo
Alligator
Psittacula
Rana
Trygon
Balaenoptera
Hippocampus
Chameleon
Bufo
Calotes
Columba
Hemidactylus
A
175
Q

Amphibia comes from __________ (Latin/Greek) and literally means __________

A

Greek,

dual, life

176
Q

Most amphibians have _____ pairs of limbs

A

2

177
Q

Amphibian body is divisible into __________ and __________

A

head, trunk

178
Q

Some amphibians (not all) have tails. T or F?

A

True

179
Q

Amphibian skin is moist due to the presence of scales. T or F?

A

False, moist without scales

180
Q

Amphibians have eyelids and a __________ that represents the ear

A

tympanum

181
Q

In amphibians, __________, __________ and __________ tracts open into a common chamber called cloaca which opens to the exterior

A

Alimentary canal, urinary and reproductive tracts

182
Q

Respiration in amphibians is by __________, __________ and __________

A

gills, lungs and through skin

183
Q

Amphibian heart is _____-chambered and the animals are __________ (cold/hot-blooded)

A

3 (2 auricles, 1 ventricle)

cold-blooded

184
Q 
Amphibian:
Sexes? 
Fertilization? 
Development?
Ovi/Vivi?
A

Separate,
External
Indirect
Oviparous

185
Q

Repitilia comes from __________ (Latin/Greek) and means __________

A

Latin, to creep or crawl

186
Q

Reptilia are mostly __________ (aquatic/terrestrial) and their body is covered by __________ skin, epidermal __________ or __________

A

terrestrial,
dry and cornified skin
scales or scutes

187
Q

Reptiles have external ear openings with tympanum representing the ear. T or F?

A

False, do NOT have external ear openings. Tympanum bit is correct

188
Q

Limbs are present in all reptiles. T or F?

A

False, absent in snakes

189
Q

Reptile limbs, when present, are in _____ (how many?) pairs.

A

two

190
Q

Heart is usually _____-chambered in reptiles but ____-chambered in __________

A

3, 4, crocodiles

191
Q

Reptiles are __________ (cold / warm-blooded)

A

cold-blooded

192
Q

__________ and __________ are reptiles that shed their scales as skin cast

A

Snakes, lizards

193
Q 
In reptilia, 
sexes? 
Fertilisation? 
Development? 
Ovi/Vivi?
A

Separate,
Internal,
Direct,
Ovi

194
Q

Characteristic feature of Aves is the presence of __________

A

feathers

195
Q

All Aves can fly. T or F?

A

False, flightless birds also exist (e.g. ostrich)

196
Q

Aves possess a beak and their __________ (fore/hind limbs) are modified into wings

A

fore limbs

197
Q

Hind limbs of aves generally have __________ and are modified for walking, swimming or clasping tree branches

A

scales

198
Q

Aves: Skin is dry without glands except the __________ gland at the base of the tail

A

oil

199
Q

Aves: Endoskeleton is fully __________ and the long bones are hollow with __________

A 
fully ossified (bony)
air cavities (pneumatic)
200
Q

Digestive tract of birds has additional chambers called __________ and __________

A

crop, gizzard

201
Q

Heart is _____-chambered in aves and they are __________ (cold/warm-blooded)

A

4, warm-blooded (homoiothermous)

202
Q

Respiration in birds is by __________ and supplemented by connected __________

A

lungs, air sacs

203
Q 
In aves, 
Sexes? 
Fertilisation? 
Development? 
Ovi/Vivi?
A

Separate,
Internal,
Direct,
Oviparous

204
Q

Mammals are found in a variety of habitats, and some have even adapted to fly or live in water. T or F?

A

True

205
Q

Most unique mammalian characteristic is the presence of __________

A

milk-producing mammary glands

206
Q

Mammals have _____ pairs of limbs, adapted for walking, running, climbing, burrowing, swimming or flying

A

two

207
Q

Skin of mammals is unique in that it has __________

A

hair

208
Q

External ears aka __________ are present in mammals with different types of teeth present in the jaw.

A

pinnae

209
Q

Mammalian heart is _____-chambered and they are __________ (cold/warm-blooded)

A

4, warm-blooded

210
Q

Respiration in mammals is by __________

A

lungs

211
Q 
Mammals:
Sexes?
Fertilisation? 
Development?
Ovi/Vivi?
A

Separate
Internal
Direct
Viviparous (with some exceptions e.g. Ornithorynchus - platypus)

212
Q

__________ are multicellular animals that have characteristic flagellated choanocytes

A

Porifera

213
Q

__________ have tentacles and bear cnidoblasts

A

Coelenterates

214
Q

Agnatha is represented by the class __________

A

Cyclostomata

215
Q

__________ are the most primitive chordates

A

Agnatha

Biology (NCERT) - Class XI (23 decks)

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