Animal kingdom Flashcards

1
Q

Any plane that passes through the centre does not divide them into equal halves

A

Asymmetry

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2
Q

When
any plane passing through the central axis of
the body divides the organism into two identical
halves, it is called

A

Radial symmetry

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3
Q

Where the body can be divided into identical left and
right halves in only one plane.

A

Bilateral symmetry

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3
Q

Animals in which the cells are arranged in two
embryonic layers, an external ectoderm and
an internal endoderm, are called

A

Diploblastic

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4
Q

Those animals in which the developing embryo has a third germinal layer,
mesoderm, in between the ectoderm and endoderm, are called

A

Tripoblastic

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5
Q

The body cavity, which is lined
by mesoderm is called

A

Coelom

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6
Q

Animals
possessing coelom are called

A

Coelomates

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7
Q

Such a body cavity is called
pseudocoelom and the animals possessing them
are called

A

Pseudocoelomates

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8
Q

The animals in
which the body cavity is absent are called

A

Acoelomates

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9
Q

in earthworm, the body shows this pattern called metameric segmentation and the phenomenon is known as?

A

Metamerism

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10
Q

is a mesodermally derived rod-like structure formed on the
dorsal side during embryonic development in some animals

A

Notochord

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11
Q

Animals with
notochord are called

A

Chordates

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12
Q

those animals which do not form this structure (no notochord) are called

A

Non-chordates

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13
Q

Members of phylum porifera are known as

A

Sponges

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14
Q

They are generally marine and mostly
asymmetrical animals

A

Sponges

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15
Q

Sponges have a water
transport or canal system. Water enters through
minute pores

A

Ostia

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16
Q

Water enters through
minute pores (ostia) in the body wall into a central
cavity, spongocoel

A

Spongocoel

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17
Q

Water enters through
minute pores (ostia) in the body wall into a central
cavity, spongocoel, from where it goes out
through the

A

Osculum

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18
Q

Blank or collar cells line the spongocoel and the canals.
Digestion is intracellular

A

Choanocytes

19
Q

The Sponge body is supported
by a skeleton made up of

A

Spicules

20
Q

Sexes are not separate
i.e., eggs and sperms are produced by the same
individual.

A

Hermaphrodite

21
Q

reproduce asexually by
fragmentation and sexually by formation of
gametes.

A

Sponges

22
Q

They are aquatic, mostly marine, sessile or free-swimming, radially
symmetrical animals

A

Phylum Coelenterata (cnidaria)

23
Q

is derived from cnidoblasts or cnidocytes (which contain the stinging capsules or
nematocysts) present on the tentacles and the body

A

Name of Cnidaria

24
Q

are used
for anchorage, defense and for the capture of prey

A

Cnidoblasts

25
Q

exhibit tissue level of organisation and are diploblastic.

A

Cnidarians

26
Q

Cnidarians have a central
gastro-vascular cavity with a single opening, mouth on this. Digestion is intra and extracellular

A

Hypostome

27
Q

have a skeleton composed of calcium carbonate

A

Corals

28
Q

Cnidarians exhibit
two basic body forms called

A

Polyp and medusa

29
Q

is a sessile and cylindrical form like Hydra, Adamsia, etc

A

Polyp

30
Q

is umbrella-shaped and free-swimming like Aurelia or jelly fish.

A

Medusa

31
Q

commonly known as sea walnuts or comb
jellies are exclusively marine, radially symmetrical, diploblastic organisms with tissue level of organisation.

A

Ctenophores

32
Q

The body bears
eight external rows of this, which help in
locomotion

A

Ciliated comb plates

33
Q

is well-marked in ctenophores

A

Bioluminescence

34
Q

They have dorso-ventrally flattened body, hence are called
flatworms. These are mostly endoparasites found
in animals including human beings

A

Platyhelminthes

35
Q

are bilaterally
symmetrical, triploblastic and acoelomate animals with organ
level of organisation

A

Flatworms

36
Q

help in osmoregulation and excretion

A

Flame cells

37
Q

The body of this is circular in
cross-section, hence, the name roundworms. They may be freeliving, aquatic
and terrestrial or parasitic in plants and animals.

A

Aschelminthes

38
Q

have organ-system level of body organisation. They are bilaterally symmetrical,
triploblastic and pseudocoelomate animals

A

Roundworms

39
Q

Sexes are separate, i.e., males and females are distinct.

A

DIoecious

40
Q

Alimentary canal is complete with a well-developed

A

Muscular pharynx

41
Q

They may be aquatic (marine and fresh water) or
terrestrial; free-living, and sometimes parasitic.

A

Phylum Annelida

42
Q

Their body surface is
distinctly marked out into this and, hence, the phylum name
Annelida (Latin, annulus : little ring)

A

Segments/Metamers

43
Q

Aquatic annelids like
Nereis possess lateral appendages,
which help in swimming

A

Parapodia

44
Q

help in osmoregulation and excretion

A

Nephridia

45
Q

An aquatic form, is dioecious

A

Nereis

46
Q

Earthworms and leeches are

A

Monoecious