Search SchoolNGR

Biology Past Questions and Answers

Waec Biology Questions

Question 36:

Which of the following characteristics is associated with commensalism?

SchoolNGR Classroom

A Both organisms are harmful to each other
B The association involves many organisms
C The association is beneficial to one of the organisms
D Both species are beneficial to each other
E This relationship is found only among higher plants

View Answer & Explanation

Question 37:

Which of the following statements is not correct about the ecological effects of agricultural activities?

SchoolNGR Classroom

A The use of herbicides and pesticides in farms can cause pollution
B Bush-burning encourages desertification
C Excessive use of fertilizers in farms may have harmful effects
D Tillage of tropical soils with ploughs and harrows may encourage erosion
E Monocropping is one of the cultural methods of controlling pests.

View Answer & Explanation

Question 38:

Pests can be controlled without the subsequent danger of polluting the ecosystem by

SchoolNGR Classroom

A Introducing a population of species similar to that of the pest
B Increasing the population of the natural enemies of the pest
C Eliminating the natural enemies of the pest
D Keeping the population of natural enemies of the pest constant
E Spraying the ecosystem with pesticide

View Answer & Explanation

Question 39:

The activities of an organism which affect the survival of another organism in a habitat can be described as

SchoolNGR Classroom

A Biotic factors
B Climatic factors
C Physiographic factors
D Edaphic factors
E Abiotic factors

View Answer & Explanation

Question 40:

Which of the following. groups of organisms feeds directly on green plants?

SchoolNGR Classroom

A Producer
B Decomposer
C Primary consumer
D Secondary consumer
E Tertiary consumer

View Answer & Explanation

Stay Updated

Follow us on:

Subjects