Transpiration — Biology STD 10 — Question

A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.
What aspect of photosynthesis was being investigated?

Give Reason:
Why X-linked recessive diseases are more common among males than females.

Give the main function of the following:
Fovea centralis

Where does transpiration take place in leaves? Give names of the various parts.

Name the following:
A type of blood circulation found in mammals.

Name the following:
The smallest common blood vessels formed by the union of capillaries.

Name the following:
In embryological stage right and left auricles are communicated by.

Look at the cartoonist's presentation of a kind of pollution given below and

Name the kind of pollution.

Name the Following :
The knot like mass of blood capillaries in Bowman's capsule.

Name the following :
The inward movement of solvent molecules through the plasma membrane of a cell.