Echinoderms are not characterized by:

1. An absence of excretory system

2. Bisexual animals

3. Usually external fertilization

4. Indirect development with free swimming larva

Operculum and an air bladder are present in :

1. Clarias

2. Pristis

3. Trygon

4. Carcohrodon

Identify the incorrectly matched pair:

Pteropus is a/an:

Which of the following is not an arthropod characteristic?

1. Jointed appendages

2. Non-segmented bodies

3. Periodic moulting

4. Articulated exoskeleton

The character that gives the Phylum Chordata is shown by:

1. A

2. B

3. C

4. D

The structure shown in the given diagram is characteristically seen in the Phylum:

1. Porifera

2. Ctenophora

3. Cnidaria

4. Molluska

An animal with the following body wall organization will not have:

1. Cephalization

2. Three germ layers

3. Bilateral symmetry

4. A complete digestive tract

Consider the following statements:

I. Platyhelminths are acoelomates and use protonephridia as excretory structures.

II. Aschelminthes are pseudocoelomates and have bilateral symmetry.

III. Adult echinoderms show radial symmetny and exhibit deuterostome type embryonic development.

Which of the above statements are true?

1. I and II only

2. I and III only

3. II and III only

4. I, II and III

Consider the following statements:

Chordates-

I. Possess a solid, single and ventral nerve cord

II. Have pharyngeal gill slits at some point during their development.

III. Have post-anal tail

Which of the above statements are true?

1 I and II only

2. I and III only

3. II and III only

4. I, II and III