How many of the characters given below are true for echinoderms?

I.	An endoskeleton of calcareous ossicles
II.	The adult echinoderms are radially symmetrical but larvae are bilaterally symmetrical.
III.	They are triploblastic and coelomate animals.
IV.	Digestive system is complete.
V.	Water vascular system
VI.	Sexual reproduction, internal fertilization, and direct development.

1. 3
2. 4
3. 5
4. 6

Which of the following is not seen in hemichordates?

1. A tripartite body organization

2. Stomochord

3. Rudimentary notochord

4. Proboscis gland

Consider the following features:

I. Ampulla of Lorenzini

II. Operculum or gill cover

III. Ureotelism

IV. Viviparity

V. Swim bladder

VI. Lateral line system

The features that can be attributed to cartilaginous fishes are:

1. I, III and IV only

2. II, V and VI only

3. I, II, III and IV

4. All

Key features that appeared for the first time in amphibians do not include:

1. Legs

2. Nutritional deficiencies

3. Lungs

4. Pulmonary veins

Consider the following characters:

I. Wish bone furculum

II. Pneumatic bones

III. Feathers

IV. Endothermy

V. Left aortic arch

VI. Four chambered heart

Which of these are unique to birds?

1. I, II and III only

2. I, II, III and IV only

3. I, II, III, IV and V only

4. All

Identify the incorrectly matched pair:

Reptiles were very successful on land while amphibians were not. What evolutionary development was primarily responsible for the success of reptiles on land?

1. Scales over skin

2. Thoracic breathing

3. Amniotic egg

4. Strong Jaws

Which of the following is not a feature of Tunicates?

1. Only the larvae have notochord

2. Presence of endostyle

3. Secretion of cellulose sac

4. Larvae are voracious eaters

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

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