Find out how much cellulose is made by all the plants in the biosphere and compare it with how much of paper is manufactured by man and hence what is the consumption of plant material by man annually. What a loss of vegetation!

What is artifical selection? How man has employed to obtain new varieties of plants and animals?

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?

My elder sister divided the water melon into 16 parts .I ate 7 out them.My friend ate 4.How much did we eat between us?How much more of water melon did I eat compared to my friend?What amount of watermelon remained?

The species diversity of plants (22 per cent) is much less than that of Animals (72 per cent). What could be the explanations to how animals achieved greater diversification?

What is meant by stoma?Name the group of plants,which contains fewer stomata on the upper surface of leaves .How does the absorption and loss of poassium ions in the guard cells bring about the opening and closuure of stmata?Explain.

Nazima is fly fishing in a stream. The tip of her fishing rod is 1.8 m above the surface of the water and the fly at the end of the string rests on the water 3.6 m away and 2.4 m from a point directly under the tip of the rod. Assuming that her string (from the tip of her rod to the fly) is taut, how much string does she have out ? If she pulls in the string at the rate of 5 cm per second, what will the horizontal distance of the fly from her after 12 seconds ? .