Closed circulatory system is not found in

1. octopus

2. tunicates

3. echinoderms

4. squids

Polyp phase is absent in the life cycle of:

(1) Hydra

(2) Hormiphora

(3) Pennatula

(4) Physalia

Which of the following is a fish?

(1) Flying fish

(2) Jelly fish

(3) Devil fish

(4) Star fish

Which of the following is not an annelid?

1. Leech

2. Earhtworm

3. Sea mouse

4. Sea cucumber

Buoyancy in a bony fish is maintained with the help of

(1) streamlined body

(2) paired fins

(3) swim bladder

(4) all the above

In which of the following animals the adults have pentamerous radial symmetry while their larvae are bilaterally symmetrical?

1. Arthropods

2. Molluscs

3. Echinoderms

4. Annelids

Botryoidal tissue is found in

(1) hirudina

(2) polychaeta

(3) oligochaeta

(4) all of these.

Which of the following is an egg laying mammal?

1. Kangaroo

2. Platypus

3. Penguin

4. Whale

Class Crustacea has following features:

(1) Cephalothorax, book lungs, chitinous exoskeleton

(2) Head and thorax, biramous appendages, book lungs

(3) Head and thorax, book lungs, chitinous exoskeleton

(4) Cephalothorax, biramous appendages, gills

Which of the following is wrongly matched?