Q4 of 67 Page 48

Fill in the blanks by choosing the correct alternative from those given in brackets.

When placed in a more concentrated solution, the cell contents will ......... (Shrink / swell up)

When placed in a more concentrated solution, the cell contents will shrink because in a more concentrated solution exosmosis of water occurs. This leads to the plasmolysis of cells when placed in a hypertonic solution.


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3

Complete the following statements:

Active transport is one in which the ions outside the roots move in with expenditure of energy ...........

 3

Complete the following statements:

The bending movements of certain flowers towards the sun and the sleep movements of certain plants at night are examples of ..............

 4

Fill in the blanks by choosing the correct alternative from those given in brackets.

The pressure by which the ......... molecules tend to cross the semi-permeable membrane is called osmotic pressure. (Salt / water)

 4

Fill in the blanks by choosing the correct alternative from those given in brackets.

Active transport is in a direction ......... to that of diffusion. (Opposite / same)