IGCSE Biology Paper-2: Specimen Questions with Answers 47 - 49 of 103

Question number: 47

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Question

Picture shows a food web

Picture shows a food web with crab

Picture Shows a Food Web with Crab

Image shows a food web with different producers, herbivore and carnivores

What are the autotrophs in given food web-?

Choices

Choice (4) Response

a.

Plant plankton and algae

b.

Seaweed and plant plankton

c.

Sea Anemone and Seaweed

d.

Seaweed and shrimp

Answer

b.

Explanation

Autotrophs comes under first trophic level of food web and they get energy by the process of photosynthesis. In given figure seaweed and plant planktons are the autotrophs.

Question number: 48

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Question

Respiration is the process by which animals exchange some gases with their environment. Complete the process of respiration.

+ →?

Choices

Choice (4) Response

a.

+ + Energy

b.

+ + Energy

c.

+ + Energy

d.

Question does not provide sufficient data or is vague

Answer

b.

Explanation

Respiration is the movement of oxygen from the outside air to the cells within tissues, and the transport of carbon dioxide in the opposite direction.

+ →6C + + Energy

Question number: 49

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Question

The example of ionic radiation is-

Choices

Choice (4) Response

a.

X-rays

b.

UV rays

c.

Visible rays

d.

Solar rays

Answer

a.

Explanation

Ionizing radiation is radiation that carries enough energy to free electrons from atoms or molecules, thereby ionizing them and example of such ionic radiation are- X-rays and gamma rays. All other three rays are the example of non-ionizing rays.