Class 6 General Science Notes: - Unit-2: Reproduction in Plants: Solved Exercise (MCQs)

A. MCQs (Choose the Correct Answers).

1. A potato can be grown from its seeds, but mostly farmers cut pieces of potato tubers and bury them in soil because

a. it needs more water.
b. it is a quick way of producing plants.
c. potato pieces are useless.
d. it is the habit of farmers.

... Answer is b. it is a quick way of producing plants.
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2. Farmers prefer vegetative propagation methods because they can:

a. Produce new varieties
b. Grow plants/crops quickly and easily
c. Cope with all types of diseases
d. Survive all types of weather changes

... Answer is b. Grow plants/crops quickly and easily
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3. Which one of the following is not a process involved in vegetative propagation?

a. Cutting
b. Tuber
c. root Runner
d. Fertilization

... Answer is d. Fertilization
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4. Sexual reproduction is a big advantage to a group of organisms because it provides a lot of

a. variety in organisms.
b. identical organisms.
c. energy for organisms to survive.
d. similar copies of parents.

... Answer is a. variety in organisms.
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5. An onion plant produces a new plant without the formation of seeds. This type of reproduction is called

a. budding.
b. fragmentation.
c. fission.
d. vegetative propagation.

... Answer is d. vegetative propagation.
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6. Tulips, lilies, and onions can be reproduced by

a. bulbs.
b. tubers.
c. cuttings.
d. runners.

... Answer is a. bulbs.
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7. A stem is part of a shoot system which grows in the air. Sometimes stem can be underground in plants like :

a. rose and jasmine.
b. mango and orange.
c. strawberry and mint.
d. potato and onion.

... Answer is d. potato and onion.
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8. Potato tubers have depressions called eyes. If a piece is without an eye it will not grow into a new plant because eyes

a. have seeds.
b. have buds.
c. can grow branches.
d. can grow roots.

... Answer is b. have buds.
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9. Grafting is done mostly in fruit trees to provide rootstock which has:

a. Weak roots
b. Strong and resistant roots
c. Diseased roots
d. Small roots

... Answer is b. Strong and resistant roots
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10. In the layering technique no harm is caused to the parent plant because:

a. Few branches are involved
b. Some roots are used as rootstock
c. Some leaves are removed
d. Some buds are added

... Answer is a. Few branches are involved
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MCQs of General Science Class-6:

Unit-1, Unit-2, Unit-3, Unit-4, Unit-5, Unit-6, Unit-7, Unit-8, Unit-9, Unit-10, Unit-11, Unit-12

Source: General Science Book (National Book Foundation, Pakistan)

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