IGCSE Biology Paper-1: Specimen Questions with Answers 45 - 48 of 208

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Question 45

Question

MCQ▾

What is the full form of CEPT in waste water treatment technology?

Choices

Choice (4)

a.

Combine energy production treatment

b.

Chemically effluent primary treatment

c.

Chemically Enhanced Primary Treatment

d.

Chemical exchange production technology

Answer

d.

Explanation

Combine energy production treatment increase the treatment efficiency and removal of solid organic compounds from the waste water.

Question 46

Question

MCQ▾

Number of chromosomes found in normal mature human sperm cell?

Choices

Choice (4)

a.

26

b.

22

c.

23

d.

10

Answer

c.

Explanation

Sperm of humans is haploid so it has 23 pair՚s chromosomes.

Question 47

Question

MCQ▾

Lichen is composed by fungus and alga. The relationship in which both depend on each other is known as

Choices

Choice (4)

a.

Symbiosis

b.

parasitism

c.

mutualism

d.

Commensalism

Answer

a.

Explanation

Such type of relationship is found in green algae and fungus. The fungus benefits from the algae because they produce food from sun light and the algae benefits from the filaments of fungus.

Question 48

Question

MCQ▾

What is the major source of acid rain?

Choices

Choice (4)

a.

CO2 and CO

b.

HNO3 and H2SO4

c.

NH3 and CH4

d.

CO2 and SO2

Answer

b.

Explanation

Chemical reaction occur in atmosphere-

Shows Given Image in Major Source of Acid Rain

Acid rain is caused by releases of sulfur dioxide and nitrogen oxide, which react with the water in the atmosphere to produce acids.

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