Limbs are present in

(1) Osteichthyes

(2) Chondrichthyes

(3) Reptiles

(4) urochordates

Which of the following statement/s about chondrichthyes are incorrect?

1) Notochord is persistent throughout life

2) Endoskeleton is made up of bones

3) Operculum present

4) Skin is covered by placoid scales

(1) All of the above

(2) None of the above

(3) 1 and 4 are incorrect

(4) 2 and 3 are incorrect

Which of the following animal has a bony endoskeleton?

(1) Exocoetus

(2) Clarias

(3) Pristis

(4) both (1) and (2)

In which of these examples are the members exclusively chondrichthyes

(1) Scoliodon, Pristis, Labeo, Betta

(2) Scoliodon, Pristis, Betta, Trygon

(3) Scoliodon, Trygon, Pristis, Carcharodon

(4) Scoliodon, labeo, Carcharodon, Pristis

Dry, cornified skin along with epidermal scales or scutes is found in

(1) Tortoise

(2) Hyla

(3) Bufo

(4) All of the above

The common name of Calotes versicolor is

1. Garden lizard

2. Tree lizard

3. Wall lizard

4. Monitor lizard

Assertion   :       Starfish moves through crawling.

Reason      :       Starfish utilise a flow of water over the surface, for movement.

Assertion   :       Claspers of cartilage fishes are analogous to penis of human male.

Reason      :       Both act as copulatory organs and transfer the sperms into female.

Identify the incorrectly matched class of vertebrates with the features given :

1. Fishes - Jaws and paired appendages (except Agnathans); Single loop circulation; Gills

2. Amphibians - Legs ( except in Caecilian); three chambered heart; no pulmonary veins

3. Reptiles - Amniotic egg; dry skin, thoracic breathing

4. Birds - Feathers; flight skeleton; endothermy

A high regeneration capacity is present in

(1) Planaria

(2) Ancylostoma

(3) Sepia

(4) Sea cucumber