Answer the following :

Name the vessel which supplies blood to the heart muscles.

Answer the following :

Name the gene of a cancer causing virus responsible for transformation.

Answer the following :

What is phylogeny ?

Answer the following :

Which hormone keeps leaves green for a longer time ?

Give reasons for the following :

Growth of long bones is bi-directional

Explain briefly :

Photophosphorylation

Explain briefly :

Autotomy

Answer the following :

Why is the shape of the right lung slightly different from that of the left lung ?

Give reasons for the following :

Short day plants are called long night plants.

Explain briefly :

Quiescent Centre