Waec Biology 2013 Past Questions and Answers

Question 36:

• WAEC 2013

Rhizobium which lives in the root nodules of leguminous plants is an example of the association known as

A. Commensalism
B. Epiphytism
C. Mutualism
D. Saprophytism

Question 37:

• WAEC 2013

Ascaris lumbricoides is a parasitic

A. Flat worm
B. Round worm
C. Arthropod
D. Elastic worm

Question 38:

• WAEC 2013

The following organisms are pests of plants except

A. Birds
B. Nematodes
C. Bacteria
D. Rodents

Question 39:

• WAEC 2013

The absence of alimentary canal in the parasitic flatworm can be attributed to the fact that

A. Its body does not feed
B. It has no enzymes
C. Its body absorbs digested food
D. It has suckers on the scolex

Question 40:

• WAEC 2013

Which of the following human activities would help prevent endangered species from extinction?

A. Uncontrolled killing of species
B. Regular clearing of the forest vegetation
C. Temporary maintenance of species in zoological gardens
D. Regular irrigation of their natural habitats