Which of the following is used to measure the rate of water uptake in plants?

• A. Potometer
• B. Hydrometer
• C. Hygrometer
• D. aspirator

Which of the following is NOT a method of reproduction in animals?

• A. Asexual reproduction
• B. Budding
• C. Sexual reproduction
• D. Sporulation

When two heterozygotes mate, the dominant trait will appear in

• A. the F1 generation only
• B. the F2 generation only
• C. both the F1 and F2 generations
• D. neither the F1 nor F2 generation

Pepsin is secreted as an inactive precursor called pepsinogen because

• A. pepsin as an enzyme is quickly destroyed by the alkaline food from the mouth
• B. all digestive enzymes pass through a precursor stage
• C. pepsin is a proteolytic enzyme and might attack the stomach tissues
• D. pepsin is not required in large quantities

In mammalian males, the excretory and reproductive systems share the

• A. Ureter
• B. vas deferens
• C. Urethra
• D. Testes

Which of the following diseases or disorders can be prevented by the application of the knowledge of heredity through marriage counselling?

• A. Sickle cell anaemia
• B. Haemophilia
• C. Diabetes mellitus
• D. Colour blindness

Use the diagram below that shows the effect of nitrates on water bodies Study it carefully and answer questions.

The source of the nitrates in the diagram is termed

• A. root nodules of legumes
• B. cloud
• C. fertilizers
• D. organic matter

Nastic movement is in response to

• A) gravity
• B) Directional stimuli
• C) Non directional stimuli
• D) Para tonic stimuli

A student used the following steps in testing for a non-reducing sugar.

I. added Benedict's solution to the sugar solution

ll. added dilute hydrochloric acid to the sugar and boiled it;

lll. added sodium hydroxide solution to the solution in ll. and boiled;

IV. added Benedict's solution to the cooled solution in lll.

Use this information above to answer the question.

What is the importance of step ll in the testing process? To

• A. neutralize the sugar solution
• B. soften the sugar solution
• C. change the colour of the sugar solution
• D. increase the acid content of the sugar solution

Water fleas, wood lice and barnacles belong to the group?

• A. arachnida
• B. crustacea
• C. insecta
• D. chilopoda