IGCSE Biology Paper-1: Specimen Questions with Answers 38 - 41 of 109

Question number: 38

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Question

This diagram shows hydrological cycle. R and T are?

 Diagram of Water cycle – Find R and T

Diagram of Water Cycle – Find R and T

Finding R and T in the system above

Choices

Choice (4) Response

a.

Condensation and precipitation

b.

Evaporation and condensation

c.

Evaporation and precipitation

d.

Question does not provide sufficient data or is vague

Answer

a.

Explanation

Condensation is a process in which water vapors are change in liquid water and it is responsible for cloud formation. And Precipitation is type of water that forms in the Earth’s atmosphere and then drops onto the s the Earth.

Question number: 39

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Question

The minimum DO for survival of fish in river is?

Choices

Choice (4) Response

a.

3ppm

b.

10ppm

c.

6ppm

d.

4ppm

Answer

d.

Explanation

It is the amount of oxygen present in water and for fish the minimum dissolved oxygen is about 4ppm.

Question number: 40

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Question

What is the example of abiotic environment?

Choices

Choice (4) Response

a.

Primary consumers

b.

Bacteria

c.

Light

d.

Decomposers

Answer

c.

Explanation

Abiotic environment is nonliving physical and chemical parts present on earth. For example- Light, soil, wind, water etc.

Question number: 41

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Question

What will happen if red blood cells are put in distilled water?

Choices

Choice (4) Response

a.

It will shrink

b.

It remain unchanged

c.

It will burst

d.

It will enlarge

Answer

c.

Explanation

Due to osmosis water will enters into the RBC. RBCs have a tinny plasma membrane, so it will not control high pressure and will enlarge with water and finally it will burst.