IGCSE Biology Paper-3: Specimen Questions with Answers 102 - 107 of 230

Question number: 102

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Homeostasis is the property of a system in which variables are regulated so that internal conditions remain stable and relatively constant.

Write two importance of homeostasis

Explanation

(a) To maintain internal environment of the organisms especially higher vertebrates in a steady and balance state.

(b) To establish optimum conditions of organism.

Passage

Riya set fix number of fishes in three chambers, A, B and C, in May. The graph below shows the no. of fishes in the three chambers after two months.

In graph shows three chambers and number of fishes present init

In Graph Shows Three Chambers and Number of Fishes Present Init

In given graph there are the number of fishes in three chambers in May and June.

Question number: 103 (1 of 3 Based on Passage) Show Passage

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What fish essential to stay alive?

Explanation

The fish need air, food and water.

Question number: 104 (2 of 3 Based on Passage) Show Passage

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what is the feature is describe the increase in the number of fish?

Explanation

Reproduction

Question number: 105 (3 of 3 Based on Passage) Show Passage

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Which one of the chamber shows maximum decrease in the number of fish in June month?

Explanation

Chamber C

Question number: 106

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What is the difference between aerobic and anaerobic respiration?

Explanation

difference between aerobic respiration & anaerobic respiration

Difference between Aerobic Respiration & Anaerobic Respiration

Table shows difference between aerobic respiration and anaerobic respiration and their features

Question number: 107

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Question

The main reason of enormous variety of protein is-

Choices

Choice (4) Response

a.

Sequence of amino acids

b.

Hydrogen bond

c.

Peptide bond

d.

Amino groups

Answer

a.

Explanation

Protein are large molecules made up of amino acids. There are enormous variety is found in protein due to polypeptide chains and the sequences of amino acids