A plant is kept in a dark room for about 24 hours before conducting any experiment on photosynthesis in order to _______.
A. remove chlorophyll from the leaf

B. remove starch from the leaves

C. ensure that photosynthesis occurred

D. to prove transpiration

Photosynthesis converts energy X into energy Y.

a) What are X and Y?

b) Green plants are autotrophic in their mode of nutrition. Why?

In leaves, the food is stored in the form of _________.

Which gas is evolved during photosynthesis?

Define photosynthesis.

In the given photosynthetic experiment, what will happen to the leaf closed with black paper in starch test? Why?

Fill in the blanks:

Name the cell that surrounds the stoma.

An organism A which cannot move from one place to another makes a simple food B from the substances C and D available in the environment. The food is made in the presence of green coloured substance E present in organs F in the presence of light energy in a process called G. Some of the simple food B also gets converted into a complex food H for storage purposes. This food gives blue-black colour with iodine solution?

a) What is (i) organism A (ii) food B and food H?

b) What are C and D?

c) Name (i) green pigments E and organ F.

d) What is the process G?

Imagine that student A studied the importance of certain factors in photosynthesis. He took a potted plant and kept it in dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with dark 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.

a) What aspect of photosynthesis was being investigated?

b) Why was the plant kept in the dark before the experiment?

c) How will you prove that starch is present in the leaves?

d) What are the other raw materials for photosynthesis?

Photosynthesis is important in releasing oxygen to keep the atmosphere in balance.