IGCSE Biology Paper-3: Specimen Questions with Answers 170 - 175 of 230
Question number: 170
Question
This diagram shows.
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
Question
This is the diagram of forest fire. It is the example of
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
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
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
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
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
Write in Short
Label the enamel
Explanation
Part A is enamel.