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1. Question

Which of the following is NOT a way in which infectious diseases can be transmitted?

2. Question

Single-celled organisms do not need a transport system because:

3. Question

Most plant and animal cells contain:

4. Question

Which one of the following diagrams illustrates short-sightedness?

(F = Focal point)

5. Question

An example of an air pollutant is:

6. Question

Which one of the following taxonomic groups contains the greatest number of organisms?

7. Question

The length of an insect such as a grasshopper increases in steps.This is because:

8. Question

All of the following processes result in energy loss from an ecosystem EXCEPT for:

9. Question

Which one of the following is NOT a receptor in the body?

10. Question

Which of the following statements about aerobic respiration is correct?

11. Question

The optimum pH for most enzyme action is:

12. Question

In a plant, water and dissolved minerals are transported in the:

13. Question

Malaria is spread by:

14. Question

In hot conditions the surface blood vessels in the skin undergo vasodilation. This allows:

15. Question

Plants lose water through their leaves by the process of:

16. Question

A species of mouse has 32 chromosomes in its muscle cells.What will be the numbers of chromosomes in the mouse′s skin cells and sperm cells?

17. Question

Which of the following substances contains the elements carbon, hydrogen, oxygen and nitrogen?
Ⅱ carbohydrates
Ⅲ lipids
Ⅳ proteins

18. Question

An enzyme which has an optimum pH of 3 will function best in the:

19. Question

The scientific name of an organism is derived from its:

20. Question

Cells become specialised to carry out different roles.This process is called:

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