Free Reproduction in Organisms 03 Practice Test - 7th grade 

Question 1

Some seeds are thrown away or scattered when the fruit bursts with a sudden jerk.

A.

True

B.

False

SOLUTION

Solution : A

Some plants like castor have fruits that burst with sudden jerks and scatter the seeds. Hence the statement is correct. This is, in fact, a form of seed dispersal in such plants.

Question 2

Plants produced by vegetative propagation:

A.

take less time to grow

B.

are identical to their parents

C.

take less time to grow and are identical to their parents

D.

take large amount of time to grow

SOLUTION

Solution : C

Plants produced by vegetative propagation are exact copies of their parent. This is a type of asexual reproduction. Such plants also take less time to grow, and mature, that is, they bear fruits faster than those produced by sexual reproduction.

Question 3

Which of the following is true about spores?

I: They are asexual reproductive bodies

II: They are sexual reproductive bodies

III: They are the mode of reproduction in some fungi

IV: They are the mode of reproduction in some plants

A.

I and III

B.

I and IV

C.

II and III

D.

I, III  and IV

SOLUTION

Solution : D

Spore formation is a type of asexual reproduction. A spore is a reproductive body found in bacteria, fungi, various plants and some protozoans, that can develop into a new individual. Hence statement I, III  and IV are correct.

Question 4

What does a pollen grain contain?

A.

Female gametes

B.

Male gametes

C.

Zygotes

D.

Seeds

SOLUTION

Solution : B

Pollen grains contain male gametes and are produced by anther. The male gamete fuses with the female gamete to produce zygote and eventually a new seed, during a process known as fertilization.

Question 5

Which of these are components of a pistil?

I: Style

II: Anther

III: Stigma

IV: Ovary

A.

I and III

B.

I, II, III and IV

C.

II and IV

D.

I, III and IV

SOLUTION

Solution : D

The pistil is the female reproductive part of a flower. It consists of the stigma, style, and ovary. Anther is the part of a stamen (male organ) that contains the pollen. Hence I, III and IV are components of a pistil.

Question 6

Budding is a mode of reproduction observed in _________ .

A.

mango trees

B.

algae

C.

yeast

D.

mushroom

SOLUTION

Solution : C

Budding is a form of asexual reproduction in plants. The new plant develops from an outgrowth or bud due to cell division at one particular site. The offspring remains attached to the parent plant as it grows until it is mature. The offsprings are identical to the parent plant. Yeast reproduces with the help of this method.

Question 7

Seeds develop from _______ after fertilization occurs.

A.

ovary

B.

ovule

C.

stigma

D.

style

SOLUTION

Solution : B

Ovules is the part of flower that develops into seed after fertilization. Ovule is located inside the ovary and it consists of the female gamete. Eventually, the ovary develops into the fruit which contains the seeds.

Question 8

Which of the following helps in pollination?

A.

Insects

B.

Wind

C.

Water

D. Sunlight

SOLUTION

Solution : A, B, and C

Pollination is defined as the act of transferring pollen grains from the male part, specifically the anther of a flower to the female part, specifically the stigma. Agents of pollination include insects, wind and water.

Question 9

Which of the following modes of reproduction is possible in plants?

A.

Only asexual

B.

Only sexual

C.

Both asexual and sexual

D.

Only vegetative propagation

SOLUTION

Solution : C

Plant reproduction can be accomplished by sexual or asexual ways. In sexual reproduction, offspring are formed by the fusion of gametes, which results in offspring, which are genetically different from the parents. In asexual reproduction, one parent is required to produce offspring and the offspring is identical to the parent. Vegetative reproduction is a mode of asexual reproduction.

Question 10

The process of fusion of female and male gametes to form a zygote is known as ________ .

A. fruit formation
B. dispersal
C. pollination
D. fertilisation

SOLUTION

Solution : D

Fertilisation is the process in which fusion of female and male gametes occurs to form a zygote. Fruits and seeds develop only after fertilisation.
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