A plant was kept in the dark room for a week. When its leaves were tested with iodine solution it did not show the presence of starch.From this experiment we can conclude that __________ is required for photosynthesis.

During photosynthesis, plants use _____ gas and release ______ gas.

Which one of the following time a plant may be preparing food?

Which one of the following is a seed containing stored food?

Cactus is a desert plant. To minimise loss of water it does not have leaves. The stem is green and waxy and prepares food for the plant. This shows that:

Harish wants to test the presence of starch in a leaf. Given below are the instructions to conduct the experiment. Which one of the following step is NOT necessary?

Which one of the following structure of a plant exchanges gases?

The main purpose of lowers is to

Which part of a seed provides energy for germination?

In carrot ,food is stored in