IGCSE Biology Paper-2: Specimen Questions with Answers 70 - 72 of 203

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Question 70

Question

MCQ▾

Pollutants may be of two types-1. Gaseous pollutants and 2 Particulate pollutants. Particulate pollutants are-

Choices

Choice (4)

a.

Small solid particles and liquid droplets

b.

Liquid droplets present in the environment

c.

Gas particles released into the atmosphere

d.

Mixture of Minerals, gas, liquid and solid particles

Answer

a.

Explanation

particulate matter (PM) or particulates are microscopic solid or liquid matter suspended in the atmosphere. Aerosol commonly denotes to the particulate mixture.

Question 71

Question

MCQ▾

Which gas was leak in union carbide company (Bhopal gas tragedy?)

Choices

Choice (4)

a.

Ethyl isothiocyanate

b.

Propyl isothiocynate

c.

Sodium thiocynate

d.

Methyl isocynate

Answer

d.

Explanation

Bhopal disaster was a gas leak incident occur in Madhya Pradesh (India) due to exposed of methyl isocyanate (MIC) gas.

Passage

The diagrams below show the maps of the same place in 2000 and 2010.

Above Map is Related to Some Plant Vegetation in Particulartime

Question 72 (1 of 2 Based on Passage)

Question

MCQ▾

Based on the figure, which plant is dispersed by water?

Choices

Choice (4)

a.

Plant M

b.

Plant N

c.

None of the above

d.

All of the above

Answer

a.

Explanation

Plants, which grow besides water often, depend on water to transport their seeds for them. In addition, in given picture plant M shows characteristics of seed dispersion by water

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