Ecology questions | form six Biology

1. (i) Define the term population explosion and explain three causes to it.
   (ii) State five negative consequences of population explosion.
2. (i) What is capture recapture method?
   (ii) Outline nine procedures used to estimate population under capture-recapture method

1. Explain how a quadrat can be used to estimate population size with respect to the three aspects of species distribution namely, species destiny, species frequency and species cover.
2. In an attempt to estimate the number of grasshopers in a secluded area, 775 grasshoppers were netted, marked and released. On the second day 1023 grasshoppers were netted and of these 279 had been marked. What was the estimated size of the grasshoppers population?

In a certain bacterial culture grown in a closed flask with supplies introduced once , that is, at the beginning of the experiment; the following observations were made through monitoring the population growth.

Growth of the bacterial population from a single cell with the generation time of 30 minutes.

1. Make a graphical representation of the data given above
2. Describe and account for the pattern of the curve observed
3. What would you expect to observe in case the experiment was allowed to continue for 40 hours?
4. Discuss the factors which would contribute to the expected observations in (c) above.

As a member of the school biology club, you have been requested to conduct a lesson to form four students on conservation of natural resources. Disccuss the points you would present to explain the:

1. meaning of conservation
2. importance of conserving the following natural resources; wildlife, water and forests.