CBSE Class-7 Science: Questions 142 - 147 of 322

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Question number: 142

» Reproduction in Plants » Modes of Reproduction » Vegetative Propagation

MCQ▾

Question

Give example of some roots, which grows into new plant through vegetative propagation:

Choices

Choice (4) Response
a.

Bulbuous plants

b.

Tuberous roots of dahlia, sweet potato and asparagus

c.

Corm

d. None of the above

Question number: 143

» Reproduction in Plants » Sexual Reproduction » Pollination

MCQ▾

Question

The type of pollination in which the pollen grains are transferred to the stigma of the pistil of the same flower is called as:

Choices

Choice (4) Response
a.

Cross pollination

b.

Self- pollination

c. None of the above
d. All of the above

Question number: 144

» Transportation in Animals and Plants » Transport of Substances in Plants » Transpiration

MCQ▾

Question

Transpiration helps to:

Choices

Choice (4) Response
a.

Cool the plants

b.

Lose the water absorbed by the roots through stomata

c.

Create a suction pull that causes the ascent of sap to the shoot tip of the tallest trees

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

Question number: 145

» Soil » Soil Profile » Horizons of Soil

MCQ▾

Question

Which horizon of the soil is called as sub soil?

Choices

Choice (4) Response
a.

B-horizon

b.

O-horizon

c.

C-horizon

d.

A-horizon

Question number: 146

» Reproduction in Plants » Modes of Reproduction » Vegetative Propagation

MCQ▾

Question

Name some stem which grow into new plants:

Choices

Choice (4) Response
a.

Onion, Ginger

b.

Strawberry, oxalis many grasses and corn

c.

Potato

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

Question number: 147

» Respiration in Organisms » How Do We Breathe? » Sneezing

MCQ▾

Question

Sudden involuntary expulsion of air from the nose and mouth due to irritation of one’s nostrils is called as:

Choices

Choice (4) Response
a.

Exhalation

b.

Inhalation

c.

Sneezing

d. All of the above

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