CIE Biology Paper-2: Specimen Questions 50 - 52 of 103

Question number: 50

MCQ▾

Question

The diagram shows carbon cycle. Which part indicates combustion of past living organisms on earth.

Figure shows carbon cycle - Find A

Figure shows carbon cycle - Find A

The diagram shows carbon cycle and identify which part indicates combustion of past living organisms on earth.

Choices

Choice (4) Response
a.

Part A

b.

Part D

c.

Part B

d.

Part C

Answer

a.

Explanation

In carbon cycle, plant use sunlight to make their own food and grow. The carbon becomes part of the plant. Plant die and convert into fossils like coal and oil after millions of years. When human burn fossil fuels, most of the carbon quickly enters the atmosphere as carbon dioxide.

Question number: 51

MCQ▾

Question

Soil erosion will be more in which condition

Choices

Choice (4) Response
a.

When high rainfall occur

b.

When low rainfal occur

c.

No rain fall

d. All of the above

Answer

a.

Explanation

Soil erosion is a naturally occuring process in which movement and deposition of soil occur. Erosion can be occur by water, wind or tillage

Question number: 52

MCQ▾

Question

What is mechanical digestion of food?

Choices

Choice (4) Response
a.

Compaction of waste

b.

Absorption of nutrients

c.

Breakdown food to smaller size without chemical changes

d.

Break down of food with chemical change

Answer

c.

Explanation

mechanical digestion is breakdown of food to smaller size without chemical change so that the digestive system can more easily process it. The best example of this is mastication, which is the term for chewing.

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