Biology Past Questions

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3876

A student used the following step in testing for a non-reducing sugar.
I. added Benedict's solution to the sugar solution
II. added dilute hydrochloric acid to the sugar solution and boiled it
III. added sodium hydroxide solution to the solution in II and boiled;
IV. added Benedict's solution to the cooled solution in III.

The colour change to be observed in step IV is

A. blue-black
B. brick-red
C. purple
D. violet

View Answer & Discuss (9) WAEC 2015

3877

Which of the following organs of the alimentary canal is not correctly matched with its function?

A. Gall bladder- stores bile
B. Liver - stores glycogen
C. Appendix - releases enzymes
D. Teeth = grind food

View Answer & Discuss (5) WAEC 2015

3878

A person suffering from obstruction of the bile duct is advised not to eat fats and oil because

A. bile digests fats and oil
B. fats and oil can only be absorbed whenbile is absent
C. bile emulsifies fat and oil
D. bile adds water to digesting food

View Answer & Discuss (4) WAEC 2015

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3879

A community reaches a climax when

A. only pioneer organisms are present
B. new habitats are constantly being formed
C. there is an introduction of new plants and animal species within the community
D. the composition and size of a community remains constant over a long period

View Answer & Discuss WAEC 2015

3880

Which of the following components make up an ecosystem?