IGCSE Biology Paper-2: Specimen Questions with Answers 90 - 92 of 203

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Question 90

Question

MCQ▾

Earth is protected from uv rays with the help of

Choices

Choice (4)

a.

Ozone layer

b.

Nitogen

c.

Ionsphere

d.

Troposphere

Answer

a.

Explanation

The ozone layer is a region of Earth՚s stratosphere that absorbs most of the Sun՚s UV radiation. It contains high concentrations of ozone gas relative to other parts of the atmosphere.

Question 91

Question

MCQ▾

Which is not an importance of study of ecosystem.

Choices

Choice (4)

a.

It indicates the available solar energy

b.

It helps to know about conservation of resources and protection from pollution

c.

Provide knowledge about inter relationship between various population

d.

It indicates about only nonliving objects

Answer

d.

Explanation

The study of ecosystem is called as ecology. Moreover, it is important because ecosystem study indicates the available solar radiation and efficiency of ecosystem. It provides knowledge about interrelationship between both nonliving and living entities.

Question 92

Question

MCQ▾

The diagram below shows the human digestive system. Name the part A and Part B?

Figure Shows Human Digestive System – Find a and B

Choices

Choice (4)

a.

A: stomach B: small intestine

b.

A: Stomach B: esophagus

c.

A: large intestine B: small intestine

d.

A: small intestine B: stomach

Answer

a.

Explanation

In the human digestive system, the process of digestion has many stages, the first of which starts in the mouth and given parts are - A: stomach B: small intestine.

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