IGCSE Biology Paper-3: Specimen Questions with Answers 170 - 175 of 230

Question number: 170

Edit
MCQ▾

Question

This diagram shows.

the diagram shows the process of ozon depletion

The Diagram Shows the Process of Ozon Depletion

figure shows Destruction of ozone by CFC.

Choices

Choice (4) Response

a.

Acid rain

b.

Pollution

c.

Greenhouse effect

d.

Destruction of ozone

Answer

d.

Explanation

ozone is a layer present in stratosphere and protect from UV rays. In give diagram destruction of ozone is shown due to chloroflourocarbon.

Question number: 171

Edit
MCQ▾

Question

This is the diagram of forest fire. It is the example of

The figure shown forest fire

The Figure Shown Forest Fire

Find the reason of forest fire

Choices

Choice (4) Response

a.

Gaseous pollutants

b.

Soil pollution

c.

Marine pollution

d.

Water pollutants

Answer

a.

Explanation

There are some natural resources of gaseous pollution like forest fire, volcanic eruption, pollen grains, dust particles etc.

Passage

Figure shows the teeth of an adult human.

 Image shows the inner part of adult human

Image Shows the Inner Part of Adult Human

In above image there are some parts are written as A, B, C, D, E and F. Label the enamel part.

Question number: 172 (1 of 5 Based on Passage) Show Passage

Edit
Short Answer Question▾

Write in Short

Name two minerals, which are useful for oral health?

Explanation

Calcium and iron

Question number: 173 (2 of 5 Based on Passage) Show Passage

Edit
Short Answer Question▾

Write in Short

What is the function of Gingivae

Explanation

It protects the jawbone, roots of the teeth, and gives a lubricated surface.

Question number: 174 (3 of 5 Based on Passage) Show Passage

Edit
Short Answer Question▾

Write in Short

Which is the hardest substance of the body

Explanation

Enamel of teeth is the hardest substance of the body

Question number: 175 (4 of 5 Based on Passage) Show Passage

Edit
Short Answer Question▾

Write in Short

Label the enamel

Explanation

Part A is enamel.