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 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

Amniotes include all except:

(1) Amphibians

(2) Reptiles

(3) Birds

(4) Mammals

Which of the following represents order of 'Horse'?

(1) Equidae

(2) Perissodactyla

(3) Caballus

(4) Ferus

An important characteristic that hemichordates share with chordates is

(1) absence of notochord

(2) ventral tubular nerve cord

(3) pharynx with gill slits

(4) pharynx without gill slits