Ch-4 Animal Kingdom

Question 1

Segmentation is present in
(A) Annelida
(B) Arthropoda
(C) Chordata
(D) All of the above

Answer 1

(D) All of the above

Question 2

Digestive system is first completed in which phylum
(A) Arthropoda
(B) Annelida
(C) Platyhelminthes
(D) Aschelminthes

Answer 2

(D) Aschelminthes

Question 3

Circulatory system is first completed in which phylum
(A) Arthropoda
(B) Annelida
(C) Platyhelminthes
(D) Aschelminthes

Answer 3

(B) Annelida

Question 4

Respiratory system is first completed in which phylum
(A) Arthropoda
(B) Annelida
(C) Platyhelminthes
(D) Aschelminthes

Answer 4

(A) Arthropoda

Question 5

How many species of animals have been described till now?
(A) >1.5 million
(B) 1.7-1.8 million
(C) >1.8 million
(D) > 1 million

Answer 5

(D) > 1 million

Question 6

Read the statement carefully:

Notochord is a mesodermally derived rod like structure formed on the ventral side during embryonic development in some animals (chordates).
Point out if any mis printing is observed in this statement.

(A) origin is not mesodermal
(B) structure is not rod like
(C) dorsal side instead of ventral side
(D) no misprinting is observed in this statement

Answer 6

(C) dorsal side instead of ventral side

Question 7

Match the columns I and II, and list of animals with their level of organisation and choose the correct sequence.
Column I Column II
a. Organ level p. Pheretima
b. Cellular
aggregate level q. Fasciola
c. Tissue level r. Spongilla
d. Organ system
level s. Obelia

Answer 7

a-(q) , b-(r) , c-(s) , d-(p)

Pheretima- earthworm (Annelida)
Fasciola- liver fluke (Platyhelminthes)
Spongilla- fresh water sponge (Porifera)
Obelia- (Coelenterata/Cnidaria)

Question 8

Open circulatory system occurs in
(A) earthworm
(B) snail
(C) cockroach
(D) both B and C

Answer 8

(D) both B and C

Question 9

Cold blooded animals are also called
(A) Ectotherms
(B) Endotherms
(C) Poikilothermic
(D) Both A and C

Answer 9

(D) Both A and C

Question 10

In which group of animals, a closed circulatory system is present
(A) Arthropoda
(B) Mollusca
(C) Hemichordata
(D) Annelida

Answer 10

(D) Annelida

Question 11

Conversion of larva into adult is called
(A) metagenesis
(B) metastasis
(C) metamorphosis
(D) metamerism

Answer 11

(C) metamorphosis

Metagenesis- thealternationof generations between sexual andasexualreproduction.

Metastasis- The spread of cancer cells from the place where they first formed to another part of the body

Question 12

Radius symmetry is shown by
(A) Coelenterata
(B) Ctenophora
(C) Echinodermata
(D) All of the above

Answer 12

(D) All of the above

Question 13

Triploblastic animals primarily show
(A) radial symmetry
(B) bilateral symmetry
(C) sexual dimorphism
(D) true coelom

Answer 13

(B) bilateral symmetry

(Echinodermata shows radial symmetry in adults and bilateral in larvae. )

Question 14

Animals which regulate their body temperature are called
(A) warm blooded
(B) homeothermic
(C) Endotherms
(D) All of the above

Answer 14

(D) All of the above

Question 15

Triploblastic organisation and bilateral symmetry starts from which Phylum during evolution
(A) Porifera
(B) Coelenterata
(C) Aschelminthes
(D) Platyhelminthes

Answer 15

(D) Platyhelminthes

Question 16

Which one is first evolved in Annelida?
(A) triploblastic development
(B) bilateral symmetry
(C) cephalisation
(D) true coelom

Answer 16

(D) true coelom

Cephalisation- the evolutionary trend toward concentrating nervous tissue, the mouth, and sense organs toward the front end of an animal.

Question 17

Heart to pump blood evolved for the first time in
(A) annelids
(B) arthropods
(C) roundworms
(D) flatworms

Answer 17

(A) annelids
(Remember earthworm- pheretima)

Roundworms- Aschelminthes
Flatworms- Platyhelminthes

Question 18

Which one of the following statements is incorrect?
(A) Mesoglea is present in between ectoderm and endoderm in Obelia
(B) radial symmetry is found in Asterias
(C) Fasciola is a pseudocoelomate animal
(D) Taenia is a triploblastic animal

Answer 18

(C) Fasciola is a pseudocoelomate animal

Obelia- Coelenterata/Cnidaria
Asterias- (Star fish) Echinodermata
Fasciola- (liver fluke) Platyhelminthes
Taenia- (tape worm) Platyhelminthes

Question 19

Body cavity is the cavity present between body wall and gut wall. In some animals the body cavity is not lined by mesoderm. Such animals are called
(A) Acoelomate
(B) Pseudocoelomate
(C) Coelomate
(D) Haemocoelomate

Answer 19

(B) Pseudocoelomate

(Haemocoelomate- the animals in which body cavity is filled with haemolymph)

Question 20

True segmentation or metamerism means
(A) body is externally and internally divided into segments
(B) each segment of body has serial repetition of at least some organs
(C) Both A and B
(D) there is no repetition of any organ in successive segments

Answer 20

(C) Both A and B

Question 21

Which of the following sponge is called venus flower basket?
(A) Spongilla
(B) Euspongia
(C) Euplectella
(D) Cliona

Answer 21

(C) Euplectella

Spongilla- fresh water sponge
Euspongia- true/bath sponge
Cliona- boring sponge

Question 22

In which of the following polyp phase does not found?
(A) Hydra
(B) Obelia
(C) Physalia
(D) Aurelia

Answer 22

(D) Aurelia

Hydra- only polyp (fresh water)
Obelia- both polyp and medusa
Physalia- both polyp and medusa (Portuguese man of war)
Aurelia- only medusa (Jelly fish)