CBSE Class-7 Science: Questions 139 - 144 of 322

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Question number: 139

» Soil » Soil » Layers of Soil

MCQ▾

Question

Different layers of soil are:

Choices

Choice (4) Response

a.

Humus, water, clay, gravel

b.

Humus, water, sand, gravel

c.

Humus clay, sand, gravel

d.

Humus water, clay, sand, gravel

Question number: 140

» Reproduction in Plants » Modes of Reproduction » Reproduction Process

MCQ▾

Question

The ability of the living organisms to produce their kind is called as:

Choices

Choice (4) Response

a.

Reproduction

b.

Embryo

c.

Budding

d.

None of the above

Question number: 141

» Winds, Storms and Cyclones » Effective Safety Measures » Action on the Part of the People

MCQ▾

Question

Basic steps to keep ourselves safe from the cyclones in home are:

Choices

Choice (4) Response

a.

Don’t use phone

b.

Keep ready emergency phone numbers

c.

Shelter in the strongest part of your home

d.

All a. , b. and c. are correct

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

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