IGCSE Biology Paper-3: Specimen Questions with Answers 190 - 194 of 358

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Question 190

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What is the example of in situ conservation of biodiversity?

Explanation

National Parks, Santuary, Biosphere Reserves

Question 191

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New technologies are used to enhance the productivity of crops.

What is the importance of fertilizers?

Explanation

(a) They give nutrition to the crops

(b) When added to soil or water, plants can develop tolerance against pests like weeds, insects and diseases.

Question 192

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What are the main enzyme producing structures of digestive system (Human beings) ?

Explanation

The salivary glands, stomach, pancreas, liver and small intestine are the main enzyme producing structures of digestive system of human being.

Passage

Figure shows an external part of heart.

Image Shows External Part of Heart

Question 193 (1 of 2 Based on Passage)

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What do you mean by CHD?

Explanation

Coronary heart disease (CHD) . A blocking of the blood vessels to the heart causes this disease. This decreases the flow of blood to the heart. If one of the blood vessels becomes completely blocked, the supply of blood to part of the heart stops and that part is damaged. This is called heart attack.

Question 194 (2 of 2 Based on Passage)

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Write the name of labeled part A , B , C, D , E in given diagram.

Explanation

A- Right branch of the trunks

B- Right Percaval vein

C- Right pulmonary vein

D-Sinus venous

E- Post caval vein

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