Page 79 - Biology Form Two

Biology for Secondary Schools

the small intestine, absorption of plant, and transport of water and
oxygen into the cells, and removal minerals from the roots.
of waste materials from cells.

5. A red blood cell haemolyses in a Revision exercise 3
FOR ONLINE READING ONLY
hypotonic solution and crenates Section A
in a hypertonic solution. Choose the correct answer.

6. A plant cell becomes turgid 1. The dissolving of coffee particles
in a hypotonic solution and in a cup of hot water is an example
plasmolyses in a hypertonic of ________.
solution. (a) liquid flow
(b) solid flow

7. The important processes in the (c) mass flow
body that involve osmosis include (d) diffusion
reabsorption of water in the 2. A semi permeable membrane is
large intestine and kidneys. This the one which ________.
enables the body to maintain water (a) allows certain materials to
balance. pass through and prevent

others
8. In plants, osmosis is important for
the absorption of water by plant (b) do not allow any material to
pass through
roots and for opening and closing (c) forms a thin layer between
of stomata.
two cells
9. Mass flow involves movements (d) allows all materials to pass

of solids, liquids, and gases while through
osmosis involves the movement of 3. The following are the basic life
water molecules. processes, except________.
(a) movement

10. Examples of mass flow include (b) feeding
the flow of blood in the circulatory (c) sleeping
system, the flow of lymph in (d) respiration

the lymphatic system, transport 4. The hypotonic solution has
of manufactured food mostly ________.
from leaves to other parts of the

Student’s Book - Form Two 73

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BIOLOGY FORM 2 NEW.indd 73