IGCSE Biology Paper-1: Specimen Questions with Answers 11 - 13 of 208

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Question 11

Question

MCQ▾

Which diagram shows a cell from the liver?

Choices

Choice (4)

a.

Which Among the Following is a Liver Cell – Choice A

b.

Which Among the Following is a Liver Cell – Choice B

c.

Which Among the Following is a Liver Cell – Choice C

d.

Which Among the Following is a Liver Cell – Choice D

Answer

c.

Explanation

Liver cell has nucleus, rough endoplasmic reticulum and free ribosome.

Image Showing Liver Cell

Question 12

Question

MCQ▾

Which theory explains the process of water flow upwards through the xylem of plants?

Choices

Choice (4)

a.

Cell theory

b.

Cohesion-tension theory

c.

Darwin՚s theory of evolution

d.

Theory of plant morphology

Answer

b.

Explanation

Cohesion tension theory was proposed in 1894 by Dixon and Joly.

Main process includes: Cohesion of water.

Adhesion between water and xylem tissues.

Transpiration pull.

Question 13

Question

MCQ▾

Xylem consists of?

Choices

Choice (4)

a.

Xylem parenchyma

b.

Fibers

c.

Tracheids

d.

All a., b. and c. are correct

Answer

d.

Explanation

Parenchyma is one of the three main types of ground tissue, it has distinguished thin cell wall.

Tracheids are elongated cells in the xylem of vascular plants that serve in the transport of water and mineral salts.

The fibers of the xylem are always lignified.

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