IGCSE Biology Paper-1: Specimen Questions with Answers 108 - 109 of 109

Question number: 108

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Question

If pH of a blood is higher than 8 it will refer as-

Choices

Choice (4) Response

a.

Buffer solution

b.

Alkalosis

c.

Acidosis

d.

Neutralization

Answer

b.

Explanation

The pH of any fluid is the measure of the hydrogen ion (H-) concentration. Alkalosis occurs when body has too many bases. It occur due to reduced blood levels ofCO2, which is an acid. It can also occur due to increased blood levels of bicarbonate, which is a base.

Question number: 109

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Question

The unwanted sound, which is released into the environment is called as-

Choices

Choice (4) Response

a.

Air pollution

b.

Marine pollution

c.

Thermal pollution

d.

Noise Pollution

Answer

d.

Explanation

The noise pollution is the undesirable sound, which release into the environment. It disturbs the human being and cause an adverse effect on the mental and psychological wellbeing. It is measured in the units of decibels and is denoted by the dB.