Important Terms and Classification of Animals Questions and Answers

Important Terms and Classification of Animals MCQ (Multiple Choice Questions and Answers)

Question 1 :  Animals floating passively on water surface are

A) Phytoplankton

B) Zooplankton

C) Nekton

D) Pelagic

Answer : B

Question 2 : Animals living in open sea are

A) Nekton

B) Benthos

C) Plankton

D) Pelagic

Answer : D

Question 3 : Animals that move about or swim about in sea are

A) Plankton

B) Sedentary

C) Pelagic

D) Benthic

Answer : C

Question 4 :  Animals floating or swimming in surface film of water are[/alert-announce]

A) Neuston

B) Nekton

C) Pelagic

D) Seston

Answer : A

Question 5 :  Actively swimming animals constitute

A) Tripton

B) Seston

C) Nekton

D) Plankton

Answer : C

Question 6 : Bottom dwelling animals constitue

A) Plankton

B) Nekton

C) Tripton

D) Benthos

Answer : D

Question 7 : Level of organisation in sponges is

A) Cellular level

B) Acellular level

C) Tissue level

D) Organ-system level

Answer : A

Question 8 : Cell aggregate plan is found in

A) Cnidarians

B) Sponges

C) Roundworms

D) Flatworms

Answer : B

Question 9 : Level of structural organisation found in Hydra and Jelly Fishes is

A) Cellular

B) Acellular

C) Tissue

D) Organ-system

Answer : C

Question 10 : Symmetry found in Volvox is

A) Radial

B) Biradial

C) Bilateral

D) Spherical

Answer : D

Question 11 : In Hydra the symmetry is

A) Absent

B) Radial

C) Bilateral

D) Spherical

Answer : B

Question 12 : The symmetry found in an animal which can be divided into two similar halves by one plane only is

A) Radial

B) Biradial

C) Spherical

D) Bilateral

Answer : D

Question 13 : Radial symmetry occurs in

A) Fishes

B) Human beings

C) Molluscs

D) Star fishes

Answer : D

Question 14 : Majority of sponges are

A) Asymmetrical

B) Radially symmetrical

C) Spherically symmetrical

D) Bilaterally symmetrical

Answer : A

Question 15 : The phylum/phyla showing radial symmetry

A) Porifera

B) Coelenterata

C) Echinodermata and coelenterata

D) Ceolenterata and platyhelminthes

Answer : C

Question 16 : A deuterostomic animal is

A) Sea Anemone

B) Star Fish

C) Pearl Oyster

D) Cabbage Butterfly

Answer : B

Question 17 : Tube-within-a-Tube body plan is shown by

A) Coelenterates

B) Platyhelminthes

C) Aschelminthes

D) Porifers

Answer : C

Question 18 : Development of mouth later than anus is the condition called

A) Brachiostomatic

B) Schizostomatic

C) Deuterostomatic

D) Protostomatic

Answer : C

Question 19 : Blind sac body plan is shown by

A) Roundworms

B) Annelids

C) Ceolenterates

D) Arthropods

Answer : C

Question 20 : Digestive system is complete where

A) All the digestive glands are present

B) Both anus and mouth are present

C) Digestion occurs in the cavity of digestive tract

D) Digestion occurs in the individual cells lining the digestive tract

Answer : B

Question 21 : An opening serving both as mouth and anus is found in

A) Ceolenterates and porifers

B) Ceolenterates and aschelminthes

C) Ceolenterates and annelids

D) Coelenterates and platyhelminthes

Answer : D

Question 22 : Diploblastic animals occur in

A) Annelida

B) Porifera

C) Coelenterata

D) Both B and C

Answer : D

Question 23 : A coelom is absent in

A) Porifera

B) Coelenterata

C) Platyhelminthes

D) All the above

Answer : D

Question 24 : A phylum with triploblastic acoelomate animals is

A) Platyhelminthes

B) Aschelminthes

C) Annelida

D) Arthropoda

Answer : A

Question 25 : Echinoderms and chordates have

A) Pseudocoelom

B) Schizocoelom

C) Enterocoelom

D) Haemocoel

Answer : C

Question 26 : Haemocoel occurs in

A) Earthworm

B) Hydra

C) Cockroach and Pila

D) Leech

Answer : C

Question 27 : An animal with metameric segmentation/metamerism is

A) Housefly

B) Earth worm

C) Roundworm

D) Planaria

Answer : B

Question 28 : A social/colonial animal is

A) Locust

B) Mosquito

C) White Ant

D) Fish

Answer : C

Question 29 : Invertebrate constitute percentage of animal kingdom

A) 95%

B) 75%

C) 60%

D) 30%

Answer : A

Question 30 : Sponges and coelenterates resemble each other in being

A) Monoblastic and acoelomate

B) Diploblastic and acoelomate

C) Triploblastic and acoelomate

D) Triploblastic and pseudocoelomate

Answer : B

Question 31 : Annelids have

A) Tube-within-a-tube plan, unsegmented body and haemocoel

B) Blind sac plan, segmented body and true coelom

C) Tube-within-a-tube plan, metameric segmentation and true coelom

D) Tube-within-a-tube plan, metameric segmentation and enterocoelom

Answer : C

Question 32 : Metamerism is characteristic of

A) Platyhelminthes

B) Mollusca

C) Porifera

D) Annelida

Answer : D

Question 33 : Animals/organisms floating on the surface of water are

A) Plankton

B) Pelagic

C) Benthon

D) Neritic

Answer : A

Question 34 : Body does not show any segmentation in

A) Frog

B) Cockroach

C) Earthworm

D) Star Fish/Hydra

Answer : D

Question 35 : Radial symmetry occurs in

A) Fishes

B) Molluscs

C) Star Fishes

D) Sponges

Answer : C

Question 36 : Animals having well marked digestive cavity are included under

A) Protozoa

B) Enterozoa

C) Mesozoa

D) Metazoa

Answer : B

Question 37 : Haemocoel is present in

A) Hydra

B) Earthworm

C) Nereis

D) Scolopendra

Answer : D

Question 38 : A true coelom is absent in phyum

A) Nematoda

B) Annelida

C) Echinodermata

D) Mollusca

Answer : A

Question 39 : True coelom or body cavity occurs in

A) Hydra

B) Taenia

C) Pheretima

D) Sycon

Answer : C

Question 40 : An animal having diploblastic acoelomic condition is

A) Ascaris

B) Sea Anemone

C) Planaria

D) Periplaneta

Answer : B

Question 41 : True coelom appeared first in the course of evolution in

A) Aschelminthes

B) Chordata

C) Echinodermata

D) Annelida

Answer : D

Question 42 : A gregarious but nonsocial animal is

A) Ant

B) Honey Bee

C) Locust

D) Wasp

Answer : C

Question 43 : An animal without segmentation is

A) Shipworm

B) Earthworm

C) Tapeworm

D) Glow-worm

Answer : A

Question 44 : Sponges are

A) Monoblastic

B) Diploblastic

C) Triploblastic

D) Heteroblastic

Answer : B

Question 45 : The term for body cavity present in triploblastic animals is

A) Haeomocoel

B) Pseudocoelom

C) Coelom

D) All the above

Answer : C

Question 46 : Sea Anemone has a symmetry

A) Bilateral

B) Spherical

C) Pentamerous

D) Radial/Biradial

Answer : D

Question 47 : Animals devoid of respiratory, excretory and circulatory organs are

A) Tapeworms

B) Sponges

C) Threadworms

D) Live Fluke

Answer : B

Question 48 : A radially symmetrical diploblastic animal is

A) Roundworm

B) Earthworm

C) Hydra

D) Liver Fluke

Answer : C

Question 49 : Which group contains an animal that is not pseudocoelomate?

A) Enterobius, Wuchereria

B) Ascaris, Ancylostoma

C) Ancylostoma, Drancuculus

D) Ascaris, Taenia

Answer : D

Question 50 : Radial symmetry is often exhibited by animals having

A) One opening of alimentary canal

B) Aquatic mode of living

C) Benthos/sedentary nature

D) Ciliary mode of feeding

Answer : C