IGCSE Biology Paper-1: Specimen Questions with Answers 100 - 102 of 109

Question number: 100

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Question

What do you mean by pollutants?

Choices

Choice (4) Response

a.

Substances, which cause pollution

b.

Causes of pollution

c.

Effects of pollutions

d.

Prevention of pollution

Answer

a.

Explanation

Pollutants are the compounds, which cause pollution. They can be physical or chemical. They involve the particulates, gases etc. They are mostly the waste product or their byproducts.

Question number: 101

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Question

An animal has wings Feather and a beak. To which class of vertebrates does it belong?

Choices

Choice (4) Response

a.

birds

b.

amphibians

c.

mammals

d.

reptiles

Answer

a.

Explanation

Birds compose a diverse class (Aves) of species, which have different features. All birds have wings and feathers. All birds have beaks, or bills, made of a bony core surrounded by a thin layer of keratin, All birds lay eggs, Most birds have lightweight skeletons with hollow bones etc.

Question number: 102

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Question

Figure shows an animal. It is related to which subphylum?

Image shows an animal – Find Phylum

Image Shows an Animal – Find Phylum

Image indicates an animal, Identify its sub phylum

Choices

Choice (4) Response

a.

Chelicerata

b.

Uniramia

c.

Crustacea

d.

Trilobita

Answer

c.

Explanation

Examples of subphylum Crustacea are- lobsters, crabs, shrimp, barnacles, and other related organisms. The crustacean exoskeleton often contains calcium carbonate, which offers added rigidity. Crustaceans generally have three tagmata- a head, a thorax, and an abdomen.