IGCSE Biology Paper-4: Specimen Questions with Answers 52 - 54 of 120

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The graph shows rate of photosynthesis in different amount of carbon dioxide in the air. By using the graph

 rate of photosynthesis in different amount of carbon dioxide

Rate of Photosynthesis in Different Amount of Carbon Dioxide

The graph shows the effect of the amount of carbon dioxide present in the air on the rate of photosynthesis

Question number: 52 (2 of 2 Based on Passage) Show Passage

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What will be the rate of photosynthesis of carbon di oxide in the air is 0.4%

Explanation

Rate of photosynthesis will be 60 unit.

Question number: 53

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What do you mean by antibiotic and antibiotic resistance?

Explanation

Antibiotics- these are also called as antimicrobial drugs that fight infections, which are related to bacteria in humans as well as animals. They, remove infections by either killing the bacteria or making it difficult for the bacteria to grow and multiply. Antibiotics do not have any effect on viruses.

In addition, antibiotic resistance is the ability of bacteria to resist the effects of an antibiotic it occurs when bacteria change in a way that reduces the effectiveness of drugs, chemicals, or other agents designed to cure or prevent infections.

Question number: 54

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The figure shows two different types of flowers. One is insect pollinated and other is wind pollinated. Identify which one is insect pollinated and wind pollinated write two differences between insect pollination process and wind pollination process.

The figure shows two different types of flowers.

The Figure Shows Two Different Types of Flowers.

shows. One is insect pollinated and other is wind pollinated.

Explanation

Flower X is related to wind pollination because the anthers are hanging out from the flower by which wind can easily carry the pollen grains away. Flower Y is related to insect pollination.

Difference between insect pollination and wind pollination-

1. Insect pollinated flowers are bright colored and wind pollinated flower are dull in color

2. In insect pollination nectar produced in nectary and in wind pollinated flower nectar is not present.

3. The insects will carry pollen from one flower, directly into another. In contrast, the wind will carry all over the place.