IGCSE Biology Paper-3: Specimen Questions with Answers 112 - 115 of 230

Question number: 112

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MCQ▾

Question

The diagram shows a germinating bean seed.

What are the structures X, Y and Z?

the diagram shows a germinating bean seed.

The Diagram Shows a Germinating Bean Seed.

shows a germinating bean seed with it different parts

Choices

Choice (4) Response

a.

x- seed coat, y- Radicle, z- cotyledon

b.

x- cotyledon, y-Radicle, z- seed coat

c.

x- Radicle, y- seed coat, z- cotyledon

d.

x- Radicle, y- cotyledon, z- seed coat

Answer

c.

Explanation

seed coat provides protection from the environment, cotyledon help with embryo development and radicle is connected with the root.

Question number: 113

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Short Answer Question▾

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Draw the carbon cycle

Explanation

Image shows carbon cycle

Image Shows Carbon Cycle

In given figure carbon is cycle in plants, animals, microorganisms, soil and atmosphere

Question number: 114

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Short Answer Question▾

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Through the action of which enzyme maltose hydrolyzed into glucose.

Conversion of maltose to glucose

Conversion of Maltose to Glucose

Understanding the conversion of maltose to glucose

Explanation

Maltose hydrolyzed into glucose through the action of the enzyme maltase.

Question number: 115

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Short Answer Question▾

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Desertification occurs in many parts of the world.

State two reasons why desertification is carried out.

Explanation

The main cause of desertification is removal of vegetation due to drought, climate factor and over grazing. Unprotected, dry soil surfaces blow away due to wind or washed away by floods.