A definite number of segments are found in

• slug

• earthworm

• leech

• tapeworm

Which of the following assists in the locomotion of the organism stated

• Epithelium of' Pheretima

• Trichocysts of Paramecium

• Pedicellaria of Star fish

• Posterior sucker of Hirudinaria 

What is left when bath sponges dries up

• Spicules

• Spongin fibres

• Tentacles

• Holdfast

The main excretory organ of prawn is

• green gland

• flame cell

• Malphigian tubule

• nephridia

The red colour of 'red sea' is due to which of the following blue-green algae?

• Chlamydomonas nivalis

• Anabaena

• Microcystis

• Trichodesmium

Which cells are found only in sponges?

• Amoeboid cells

• Choanocytes

• Pigment cells

• Gland cells

Which of the following is not an insect?

• Locust

• Lepisma

• Termites

• Spider

The scientist, who described the birds as glorified reptiles, was

• Romer

• Huxley

•  Mendel

• Robert Hooke

Third cleavage of frog's development is

• equatorial

• vertical

• latitudinal

• none of these

In frog, the vertebra with an anterior convex surface (i.e., double convexties) is

• atlas

• urostyle

• 8th vertebra

• 9th vertebra