Waec Biology 2019 Past Questions and Answers

Question 16:

• WAEC 2019

The complex relationship between the members of a community and their physical environment is known as ____________

A. Commensalism
B. Symbiosis
C. Saprophytism
D. Ecology

Question 17:

• WAEC 2019

The specific role of a species within íts environment is known as its ____________

A. Habitat
B. Niche
C. Trophic level
D. Biotic community

Question 18:

• WAEC 2019

Which of the following soil fertility improvement methods will have the most negative effect on the ecosystem if not controlled?

A. Application of N-P-K fertilizer
B. Shifting cultivation
C. Mixed farming
D. Crop rotation

Question 19:

• WAEC 2019

Organisms in an ecosystem are usually grouped according to their trophic level into ____________

A. Carnivores and omnívores,
B. Consumers and parasites
C. Producers, and saprophytes
D. Producers and consumers

Question 20:

• WAEC 2019

In the pyramid of energy illustrated above, the organism with the least amount of transferred energy is ____________

A. Spirogyra
B. Tadpole
C. Fish
D. Bird