How do you prepare your own herbarium sheets? What are the different tools you carry with you while collecting plants for the preparation of a herbarium? What information should a preserved plant material on the herbarium sheet provide for taxonomical studies?

(b) With the help of a lens look at the pieces of paper you collected for the above questions.Do you see any difference in the material of recycled paper and a new sheet of paper?

What will you do to prevent leaf fall and fruit drop in plants? Support your answer with reason.

A gardener forget to water a potted plant for a day during summer. What will happen to the plant? Do you think it is reversible? If yes, how?

In what kind of plants do you come acroos 'Kranz' anatomy ? To which conditions are those plants better adapted ? How are these plants beteer adapted than the plants, which lack this anatomy?

A card sheet divided into squares each of size 1 mm^2 is being viewed at a distance of 9 cm through a magnifying glass (a converging lens of focal length 10 cm) held close to the eye. What should be the distance between the object in converging lens and the magnifying glass if the virtual image of each square in the figure is to have an area of 6.25 mm^2 . Would you be able to see the squares distinctly with your eyes very close to the magnifier ?

You know that 1/7= 0.bar(142857) Can you predict what the decimal expansions of 2/7,3/7,4/7,5/7,6/7 are, without actually doing the long division? If so, how? [Hint : Study the remainders while finding the value of 1/7 carefully.]