ECOLOGY - Jamb Biology Past Questions and Answers

Question 381:

• JAMB 2020

Use the table to answer the question.

Which of the zones is likely to be a desert?

A. I
B. Ii
C. Iii
D. Iv

Question 382:

• JAMB 2021

Mass of a crucible = 10g,
Mass of a crucible and soil before heating =29g
Mass of a crucible and soil after heating = 18g
From the information above, determine the percentage of water in the given soil sample?

A. 20%
B. 25%
C. 40%
D. 60%

Question 383:

• JAMB 2021

I. High birth rate and high immigration rate
II. Low birth rate and high immigration rate
III. Low mortality rate and low emigration rate
IV. High mortality rate and high emigration rate.

Which combination of the above can cause rapid over-crowding in climax biotic communities and human settlements?

A. II and III
B. I and III
C. I and IV
D. I and II

Question 384:

• JAMB 2021

The number of plant species obtained from a population study of a garden is as follows: Guinea grass (15), Ipomoea spp (5), Sida spp (7) and Imperata spp (23)

What is the percentage of occurrence of Imperata spp?

A. 35%
B. 16%
C. 46%
D. 23%

Question 385:

• JAMB 2021

When a marine fish was taken from the ocean and put in a tank of fresh water, it died after a short period because?

A. The tank was too small compared to the large-ocean
B. The body cells of the fish swelled and burst as a result of the hypotonic fresh water
C. The body cells of the fish shrank as their sap was hypertonic to the freshwater
D. There was no food in the tank, so the fish starved