Name the scientist who studied the movement of pollen grains suspends in water through a microscope. What is this phenomenon known as ?

Name the scientist who first studied living cell?

What will happen when pollen grain is placed in water ?

What is a tendril? Name the two types of tendrils. What does a tendril do in response to the touch of a support? What is this phenomenon known as?

Name the first scientist who studied the inheritance of traits from one generation to the next.

Name the scientist who first discovered penicillin antibiotic. Can you name any other known antibiotic ?

When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface. What could particles X be ? (b) What do you think liquid Y is ? (c ) What is zig-zag movement of X known as ? (d) What is causing the zig-zag movement of particles X ? (e) Name the scientist who discovered this phenomenon. (f) What does this experiment tell us about the nature of liquid Y ?

A food chain consists of fish, larvae , phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high. (a) In which organisms the pesticides enter from the polluted water ? What is the level of organisms known as ? (b) Which organism will have the maximum amount of pesticides accumulated through the food chain ? What is this process known as ? (c) Write the food chain comprising all the organisms mentioned above. (d) Which other organism you could write in place of bird in the above food chain ?

(a) What does a plant root do in response to water? What is this phenomenon known as? (b) What happens to the moonflower (i) during daytime, and (ii) at night? What is the phenomenon known as?