GCE O Level Human Biology: past questions and revision

Play grounds in an urban area such as Limbe City may (i) promote team spirit; (ii) promote good health (iii) provide revenue for the council (iv) lead to social unrest Select the correct statements above and choose the most appropriate options that follow:

1. (i) and (ii) only
2. (ii) and (iv) only
3. (i), (ii) and (iii) only
4. (i),(ii), (iii) and (iv)

Which of these characteristics makes man different from other primates?

1. The foot is arched and flat.
2. Highly developed sense of vision.
3. Possession of nails.
4. Grasping hands and opposable thumb.

How does the skin of man react to an increase in temperature of the environment?

1. The arterioles in the skin dilate
2. The arterioles in the skin constrict
3. The liver decreases its rate of chemical reaction
4. The erector pilli muscles contract

The respiratory disorder known as emphysema is caused by:

1. Inflammation of the air passages.
2. Deposition of tar in the alveoli.
3. The breakdown of the walls of the alveoli.
4. Blockage of airflow in respiratory tract.

An albino woman married to a man with normal skin pigmentation, had four children with normal skin colour. The grandchildren of this couple were of mixed complexion; some albinos, and others normal. What genetic conclusion can be deduced from the above observations?

1. The allele for albinism is dominant to that for normal skin pigmentation.
2. The allele for albinism is recessive to that for normal skin pigmentation.
3. Skin colour is controlled by traditional and cultural beliefs.
4. The alleles for albinism and normal skin pigmentation are co-dominant.