Page 142 - General and Inorganic Chemistry for Advanced Secondary Schools Students Book Form Five and Six

Biology for Secondary Schools

(d) Rhizobium bacteria helps to fix nitrogen from the air into the soil.

_______
(e) Microelements are needed by plants in large quantities. _______
(f) Copper is an example of trace elements. _______
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(g) Lamina is the external part of a leaf while midrib is the internal part.

_______
(h) A bulb is an underground storage organ formed from the plant roots.
_______
(i) Sunlight energy is not needed during photosynthesis. _______

(j) Unlike carnivores, autotrophs make their own food in the form of
carbohydrates. _______

Section B
1. Briefly explain the following terms.

(a) Photosynthesis
(b) Palisade mesophyll
(c) Photolysis

2. Differentiate the light reaction stage from dark reaction stage of
photosynthesis.

3. Describe how a plant leaf is adapted to photosynthesis.

4. Why is photosynthesis a vital process for all living organisms?

5. Why is it necessary to destarch a leaf in an experiment investigating the
importance of photosynthesis to plants?

6. Answer the following questions.
(a) Mention any two sources of sulphur in plants.

(b) Give any two signs of sulphur deficiency in plants.

(c) List down at least three functions of sulphur in plants.
(d) Why should a leaf be boiled in alcohol when testing for starch?

(e) List down the necessary conditions for photosynthesis.

136 Student’s Book Form One Student’s Book Form One

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Biology FORM 1 new.indd 136 15/10/2024 09:24:41