IGCSE Biology Paper-1: Specimen Questions with Answers 27 - 29 of 208

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Question 27

Question

MCQ▾

The diagram shows water cycle. In which state it is in vapor form?

Diagram of Hydrological Cycle

Choices

Choice (4)

a.

T

b.

S

c.

Q

d.

R

Answer

c.

Explanation

Q is the process of evaporation in which water changes from a liquid to a vapor.

Question 28

Question

MCQ▾

Type of Graphis lichen is?

Choices

Choice (4)

a.

crustose

b.

Filamentous

c.

fruticose

d.

Foliose

Answer

a.

Explanation

Crustose Lichens: It is a habit of some types of lichens in which the plant grows tightly to a substrate forming a biological layer of the adhering creature.

Question 29

Question

MCQ▾

Define osmosis?

Choices

Choice (4)

a.

Movement of water across a semi-permeable membrane

b.

Method of producing pure water, a solvent passes by a semipermeable membrane in a direction opposite to that for natural osmosis when it is subjected to a hydrostatic pressure greater than the osmotic pressure

c.

The process in which there is movement of a substance from an area of high concentration of that substance to an area of lower concentration

d.

Separation of substances in solution by means of their unequal diffusion through semipermeable membranes.

Answer

a.

Explanation

Diffusion of fluid by a semipermeable membrane from a solution with a low solute concentration to a solution with a higher solute concentration until there is an equivalent solute concentration on both sides of the membrane.

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