Body Cavity

Q. The body cavity present between the body wall and the gut wall of vertebrates is called .

1. mesoderm
2. coelom
3. ectoderm
4. endoderm

Q. Mesoderm helps in the differentiation between

1. diploblastic and triploblastic animals
2. coelomates and acoelomates
3. acoelomates and pseudocoelomates
4. both a and b

Q.

How useful is the study of the nature of body cavity and coelom in the classification of animals?

Q. Diploblastic animals have

1. ectoderm, endoderm and mesoderm
2. ectoderm and mesoderm
3. ectoderm, endoderm and mesoglea in pouches
4. ectoderm, endoderm and mesoglea

Q. Tube-within-a-tube body plan is present in

1. Hydra
2. tapeworm
3. Ascaris
4. sponges

Q.

How is body cavity important in classfying the organism ?

Q. Enterocoelom appeared first in the course of evolution in

1. starfish
2. earthworm
3. fishes
4. roundworms

Q. Assertion :In Scypha, stomoblastula undergoes inversion and is now known as amphiblastula. Reason: Its one half bears flagella and the other half does not.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Assertion is incorrect but Reason is correct.

Q. Phylum consists of organisms which do not have a coelom.

1. Mollusca
2. Aschelminthes
3. Platyhelminthes
4. Echinodermata

Q. Three jawed pedicellariae occur in________________.

1. Asteroidea
2. Crinoidea
3. Holothuroidea
4. Echinoidea

Q. The body cavity is the cavity present between the body wall and the gut wall. In some animals, the body cavity is not lined by mesoderm. Such animals are called

1. pseudocoelomates
2. coelomates
3. acoelomates
4. none of the above

Q. Ctenophores and jellyfish resemble each other in being:

1. Diploblastic and coelomate
2. Diploblastic and acoelomate
3. Triploblastic and acoelomate
4. Triploblastic and pseudocoelomate

Q. The evolution of an internal body cavity was important in the animal body design for which of the following body functions?

1. Circulation
2. Movement
3. Organ function
4. All of these

Q.

Animals in which the body cavity is not lined by mesoderm, and instead, the mesoderm is present as scattered pouches in between the ectoderm and endoderm are:

1. Acoelomates

2. Pseudocoelomates

3. Coelomates

4. Haemocoelomates

Q.

Coelom is lined by

1. Ectoderm

2. Endoderm

3. Mesoderm

4. All of these