The female genital pore of Pheretima posthuma located upon the segment ?

• 14^th

• 16^th

• 18^th

• 15^th

Earthworms are economically important for man as these are used as

• bait for catching fish

• food of poultry

• medicine for gout

• All of the above

The centrum of eighth vertebra of frog is

• procoelous

• heterocoelous

• amphicoelous

• opisthocoelous

Which of the following is a transparent tissue ?

• Tendon

• Fibrous cartilage

• Hyaline cartilage

• All of the above

V^th cranial nerve of frog is called

• optic nerve

• vagus

• trigeminal

• opthalmic

Which one is uricotelic ?

• Frog and toads

• Lizards and birds/cockroach

• Cattle, monkey and man

• Molluscs and teleost fishes

Haemocoel is found in :

• Hydra and Aurelia

• Taenia and Ascaris

• cockroach and Pila

• Balanoglossus and Herdmania

Different colours of frog skin are controlled by:

• hormones

• melanocytes

• nervous system

• both 'a' and 'c'

Blastula of frog has :

• blastopore

• blastocoel

• arahenteron

• gastropore

Carotene pigment is found in the cells of

• dermis

• epidermis

• adipose cell

• both 'b' and 'c