Telangana Board Solutions for Chapter: Nutrition in Plants, Exercise 1: Exercise 1

Did the entire leaf get light after it was covered with black paper? If this was not the case, which parts of the leaf did not get light?

Did starch form only in those parts that were exposed to light?

In the second part of the experiment, 4 to 5 leaves of the same plant were covered with black paper without removing them from the plant. The way the black paper was cut and fixed to the leaves is shown in the figure. These leaves were plucked two days later. Their green colour was removed and they were dipped in iodine solution. The leaves turned black in the pattern shown in the figure.

On the basis of this experiment, what connection do you notice between light and starch formation?

In the chapter ‘Our food’, we read that starch, fats and proteins are present in food. They are also present in plants. Where do these substances come from?

Have you seen yellow thread-like structures twining around the stem, branches, and leaves of some trees? Fig shows such a plant. What type of nutrition does that plant have?

This thread-like plant is Cuscuta. It neither has leaves nor chlorophyll. How do they survive? From where do they get nutrition?

Try to find out the different types of saprophytes that you may find growing around you? If they are too small try to observe them with a hand lens.

Draw the pictures of the saprophytes and write the places where you found them.