Botany : Biology MCQ Practice Questions & Answers (Sanskrit) - Page 2

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21.

BOD is connected with

A

Microbes and Organic matter

B

None of the above.

C

Organic matter

D

microbes

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22.

Bioherbicides have been recommended

A

Because of their cheap rates

B

Because of their abundance

C

To prevent eco-degradation

D

Because of their ready availability

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23.

Binomial nomenclature means writing the name of plant in two words which designate

A

Species and variety

B

Genus and species

C

Order and Family

D

Family and genus

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24.

Basic taxonomic unit is

A

Species

B

Order

C

Kingdom

D

Genus

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25.

Banana is propagated by

A

Suckers

B

Crown

C

Stem cutting

D

Tillers

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26.

Automobile exhaust gas that causes major respiratory problem is

A

$NO_2$

B

Chlorine.

C

CO

D

$CH_4$

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27.

Artificial methods of vegetative propagation includes

A

cuttings

B

both b and c

C

Cloning

D

grafting

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28.

Artificial methods of reproduction do not include

A

cutting

B

layering

C

budding

D

Rhizome

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29.

Anxiety and stress are caused by

A

Noise pollution

B

Water pollution

C

Nuclear pollution

D

Air pollution

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30.

Algal bloom results in

A

Salination

B

Eutrophication

C

Biomagnification

D

Global warming

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31.

Air pollution effects are usually found on

A

Leaves

B

Stems

C

Roots.

D

Flowers

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32.

Aims of plant breeding are to produce

A

High-yielding varieties

B

Early-maturing varieties

C

all of the above

D

Disease-free varieties

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33.

Advantages of Artificial Methods of Vegetative Reproduction include

A

Crops with more yield

B

Ability to produce plants with desirable qualities

C

All of these

D

Crops with better quality

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34.

Acid rain is caused by

A

$SO_2$ and CO

B

$NH_3$ and CO

C

$SO_2$ and $NH_3$ .

D

$SO_2$ and $NO_2$

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35.

A variety or strain produced by horticultural or agricultural techniques and not normally found in natural population is called

A

Tissue culture

B

GMO

C

Cultivar

D

Hybrid

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36.

A plant breeder: waists to develop a disease resistant variety. What should he do first?

A

Mutation

B

Selection

C

Production of crop

D

Hybridisation

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37.

A low branch with a node is bent down and covered with soil in

A

Layering

B

Cutting

C

Budding

D

Marcotting

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38.

A green house gas is

A

CO

B

$CO_2$

C

$N_2$ .

D

$H_2$

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39.

A common example of stem tuber is

A

Garlic

B

Onion

C

Potato

D

Ginger

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40.

World Environment Day is

A

5th June

B

7th August

C

10th April

D

28th February

Botany in Biology : Practice MCQ Questions & Answers with Explanations