Pollution — Biology STD 10 — Question

Give the specific function of the following:
Nucleus

A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.

Write a balanced chemical equation to represent the process of photosynthesis.

Name the following:
The pressure with which the molecules of a substance diffuse.

Give Reason:

Why injury to medulla oblongata results in death?

Give Reasons for the following:
Glucose absent in the urine of a healthy person ?

Why is the law of segregation called law of purity of gametes?

Name the Following:
The structure which initiates cell division.

Name the Following :
Opening found on the under surface of leaf.

Give Technical Term for the following.
A solution whose concentration is greater than that of the cell sap.

Give Technical Terms
The process of cytoplasmic division.