Waec Biology 2011 Past Questions and Answers

Question 36:

• WAEC 2011

The following are abiotic components of an ecosystem except

A. Temperature
B. Oxygen
C. Bacteria
D. Soil

Question 37:

• WAEC 2011

Use the information on capture-recapture method to calculate the total number of organisms in a habitat.
First capture = 200
Second capture = 120
Number of organisms with mark in second capture = 40
The total number of organisms therefore is

A. 200
B. 360
C. 600
D. 800

Question 38:

• WAEC 2011

Ecological investigation in a habitat includes the following procedures except

A. Choosing a habitat
B. Identification of specimens
C. Determining the genetic makeup of specimens
D. Measuring abiotic and biotic factors

Question 39:

• WAEC 2011

Which of the following substances when lost from the body of a mammal will not be returned to the ecosystem?

A. Sweat
B. Urea
C. Heat energy
D. Carbon dioxide

Question 40:

• WAEC 2011

The rate of decomposition of organisms is faster in the tropical rain forest than in other biomes because

A. Of the relatively constant daylight
B. There are more plants per square feet
C. Of abundance of water
D. Of constant cool temperature