Consider the following sets of some animals. The set that consists of all animals belonging to the same phylum is:

(1) Pinctada, Aplysia, Chaetopleura

(2) Dentallium, Pila, Echinus

(3) Asterias, Antedon, Ascidia

(4) Adamsia, Gorgonia, Pleurobrachia

Homeothermy is exhibited by:

(1) All amniotes

(2) Birds and Mammals

(3) All dueterostomes

(4) Reptiles and Mammals

Identify the option where all the columns are not correctly matched:

Which of the following is not an Echinoderm character?

(1) Exclusively marine

(2) Radial symmetry in adults

(3) Protostome embryonic development

(4) Water vascular system

Birds are not characterized by:

(1) Forelimbs modified into wings

(2) Fully ossified endoskeleton

(3) Skin dry without glands except for oil gland

(4) Oviparous and external fertilization

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