Q1 of 58 Page 1

Name the following compounds:

(i) CH3 – CH2 – OH


(ii)

(i) It is Ethanol.

Because it contains Since this contains an alcohol and contains 2 carbon atoms. Thus, it


(i) Ethanal


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Draw a labeled diagram to show that particular stage of binary fission in amoeba in which its nucleus elongates and divides into two and a constriction appears in its cell membrane.

 36

A student focuses the image of a well illuminated distant object on a screen using a convex lens. Meter that he gradually moves the object towards the lens and each time focuses its image on the screen by adjusting the lens.

(a) In which direction – towards the screen or away from the screen, does the move the lens?


(b) What happens to the size of the image-does it decrease or increase?


(c) What happens to the image on the screen when he moves the object very close to the lens?

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What is DNA?

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List two biotic components of a biosphere.