CBSE Class-7 Science: Questions 155 - 160 of 322

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Question number: 155

» Transportation in Animals and Plants » Excretion in Animals » Excretory System in Humans

MCQ▾

Question

The process of removal of all toxic and unwanted products from the body is called as:

Choices

Choice (4) Response
a.

Excretory system

b.

Excretion

c.

Excretory product

d. All of the above

Question number: 156

» Reproduction in Plants » Modes of Reproduction » Vegetative Propagation

MCQ▾

Question

Advantages of vegetative propagation are:

Choices

Choice (4) Response
a.

Plants which do not produce seeds can only be grown vegetatively

b.

New plants are exact copies of the parent plant

c.

Plants produced by vegetative propagation take less time

d. All a. , b. and c. are correct

Question number: 157

» Respiration in Organisms » Respiration » Anaerobic Respiration

MCQ▾

Question

We get muscle cramps after a race in school because:

Choices

Choice (4) Response
a.

Muscle cells respire aerobically

b.

Accumulation of lactic acid in muscles lead to muscle cramps

c.

Muscle cells respire anaerobically

d. Both b. and c. are correct

Question number: 158

» Transportation in Animals and Plants » Circulatory System » Heartbeat

MCQ▾

Question

Successive contractions and relaxations of heart produce ‘LUBB’ and ‘DUP’ sound constitute a:

Choices

Choice (4) Response
a.

Heart beat

b.

Double circulation

c.

Pulse rate

d. Question does not provide sufficient data or is vague

Question number: 159

» Reproduction in Plants » Modes of Reproduction » Vegetative Propagation

MCQ▾

Question

Method of vegetative propagation used in plants like grapes, jasmine and bougainvillea is:

Choices

Choice (4) Response
a.

Tissue culture

b.

Layering

c.

Cutting

d. Question does not provide sufficient data or is vague

Question number: 160

» Reproduction in Plants » Modes of Reproduction » Vegetative Propagation

MCQ▾

Question

Artificial methods of vegetative propagation are:

Choices

Choice (4) Response
a.

Grafting

b.

Layering and tissue culture

c.

Cutting

d. All a. , b. and c. are correct

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