Question

II. Answer the following in two or three sentences: 2 x 5 = 10

1. Name any four categories of people who depend on the forest resources, mentioning major needs of

each category.

2. Explain the phenomenon of “biological magnification” How does it affect organisms belonging to

different trophic levels particularly the tertiary consumers?

3. ”The sex of the children is determined by what they inherit from their father and not their mother.”

Justify.

4. Distinguish between acquired and inherited traits by giving one example of each. Why are traits acquired

during the lifetime of an individual not inherited?

5. “Variations that confer an advantage to an individual organism only will survive in a population.” Justify.

III. Answer the following in one or two sentences. Draw neat labelled diagrams. 3 x 5 = 15

1. a) Draw a neat labelled diagram of human female reproductive system.

b) Where do the following functions occur?

(i) Production of an egg (ii) Implantation of zygote.

2. a) Draw a neat labelled diagram of human excretory system.

b) Name the structural and functional unit of kidney.

3. a) Draw a diagram of human respiratory system and label on it

b) Why do the walls of the trachea not collapse ’when there is less air in it?

4. Draw a diagram of the front view of human heart and label any six parts including at least two that

are concerned with arterial blood supply to the heart muscles.

5. a) What is the advantage of a disposable paper cup over a plastic cup?

b) Why is reuse of material better than recycling in saving the environment.. u get 100 points

Answer 1

Answer:

zookeeper

handucrafts

travel guides

and all combined in a word called stakeholder

Biological magnification refers to the process of increase in the concentration of a toxic chemical with increasing trophic level in a food chain. ... They enter the food chain at producer level and then transfers to the next trophic level. The tertiary consumers get more higher levels of these chemicals.