Archana Shukla Solutions for Chapter: Nutrition in Plants, Exercise 4: EVALUATE

The following diagram shows the different part of a plant.

A gas 'B' is required as one of the raw materials in this chemical process. Name it. 

The following diagram shows the different parts of a plant.

Name the other raw material C, which is essential for the process. 

The following diagram shows the different parts of a plant.

Identify and name gas D. 

Which chemical process in living cells requires oxygen to take place?

Give a reason for the following statement:
The plant is placed in the dark. It's leaves turn brown when tested with an iodine solution. 

Give a reason for the following statement:
A potted plant was kept in the dark for two days. After that, a stalk of leaves was taken from the plant. It was then placed in a bell jar containing a mixture of gases X and Y in equal volumes. This experiment set up was exposed to bright light for a period of time. Give reason how the volume of gas X decreased while the volume of gas Y increased. How will the leaves show the result when tested with Iodine solution?

Plants play a very important role in our lives. But deforestation for urbanisation is going on in our country. What would happen if we will not pay more attention to afforestation? How would living organisms be affected?

Two leaves, M and N, were used in an experiment to demonstrate the conditions needed for photosynthesis to take place. Both leaves are taken from different species of plants. They are subjected to the same conditions. 

After one hour under the Sun, both leaves are tested with iodine solution. The results are shown in the table.

Which of the following statements best explains the results of the experiment?