LESSON 17

Population growth and food supply

The relationship existed between Population growth and food supply is in such a way that for the food produced to take care of the population growth which is expected to increase in arithmetic progression (1, 2, 3, 4 etc) it has to increase in geometric progression.

Factors affecting population growth

1. Climatic conditions.
2. Food and water availability.
3. Natural disasters.
4. Drought and famine.
5. War.
6. Natality and mortality rate.
7. Rate of immigration and emigration.

Questions

1. Which of the following is not effect of overcrowding? A. Competition B. Cannibalism C. Commensal D. Death.
2. Which of the following is not a causative organism for plant disease? A. Fungi B. Bacteria C. Nematode D. Cercariae.
3. The use of parasites in controlling pest in the farm is A. Biological control B. Natural control C. Chemical control D. Parasitic control.
4. The vector for malaria parasite is A. Male anopheles B. Female anopheles C. Male Culex D. Female culex.
5. The deficiency of insulin in human body causes A. Malaria B. Diabetes mellitus C. Hepatitis D. Cholera
6. Infective hepatitis is a disease of the A. Heart B. Lungs C. Kidney D. Liver
7. Which of the following is not a class of plants based on life cycle? A. Ephemerals B. Annuals C. Biennials D. Cereals
8. Brucellosis is a bacterial disease that mostly affects A. Cattle B. Sheep and Goat C. Swine D. Poultry.
9. Anthrax affects each of the following except A. Cattle B. Sheep and Goat C. Swine D. Poultry.
10. All the following are methods of food preservation except A. Canning B. Salting C. Smoking D. Oiling