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 is present in :

(1) Clarias

(2) Pristis

(3) Trygon

(4) Carcohrodon

Identify the incorrectly matched pair:

Pteropus is a/an:

1. Limbless amphibian

2. Extinct reptile that evolved into mammals

3. Bony fish that migrates from sea water to fresh water for breeding

4. Mammal with flight

The character that gives the Phylum Chordata its name 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. Cepahilzation

2. Three germ layers

3. Bilateral symmetry

4. A complete digestive tract

In some Bilateria, the body is of many segments that show serial repetition of parts. Such segments are called as:

The phylum with exclusively marine animals is:

Chordates are not characterized by: