Botany : Biology MCQ Practice Questions & Answers (English) - Page 5

BiologyEasyBotany

81.

Ozone day is observed on

A

16th September

B

21st April

C

30th January.

D

25th December

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82.

Onion and garlic are examples of

A

corm

B

stem tuber

C

bulb

D

Rhizome

BiologyEasyBotany

83.

Noise Pollution is measured in

A

Fathoms

B

Manometers

C

Decibels.

D

Hertz

BiologyEasyBotany

84.

Mycorrhizae is associated with the following

A

Hyphae penetrating the soil

B

Found mostly in lower plants

C

Soil erosion

D

Formation of root nodules

BiologyEasyBotany

85.

Most abundant water pollutant is

A

Pesticides

B

Industrial wastes

C

Ammonia.

D

Detergents

BiologyEasyBotany

86.

Minamata disease is due to pollutant

A

Mercury

B

Hydrogen Sulphide

C

Sulphur dioxide

D

Lead

BiologyEasyBotany

87.

Major aerosol pollutant in Jet Plane emission is

A

$SO_2$

B

CO

C

$CH_4$

D

CFC.

BiologyEasyBotany

88.

Main function of biofertilizer is

A

To increase chemical process

B

To increase physiological process

C

To increase biological process

D

To increase photosynthesis process

BiologyEasyBotany

89.

Linnaeus is credited with introducing

A

The concept of inheritance

B

Law of limiting factor

C

Theory of heredity

D

Binomial nomenclature

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90.

Lichens indicate pollution by

A

$O_3$

B

$SO_2$

C

$NO_2$

D

CO.

BiologyEasyBotany

91.

Layering can be done on plants such as

A

Bulbs

B

bougainvillea

C

Sugar cane

D

Oleander

BiologyEasyBotany

92.

Layering can be done on plants such as

A

bulbs

B

Lime

C

Sugar cane

D

Oleander

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93.

Itai-Itai disease is due to the toxicity of

A

Lead

B

Cadmium

C

Strontium

D

Tin.

BiologyEasyBotany

94.

Increasing high skin cancer and high mutation rate are

A

$O_3$ depletion

B

Acid rain

C

CO pollution

D

$CO_2$ Pollution.

BiologyEasyBotany

95.

In hybridization this is not part of the technique used

A

Transfer pollen

B

Collect pollen

C

Emasculate

D

Use of two plants to bridge the stems together

BiologyEasyBotany

96.

In cutting method of vegetative propagation, cuttings are mainly taken from

A

Leaves of parent plant

B

Roots or stems of parent plant

C

Shoots of parent plant

D

Buds of parent plant

BiologyEasyBotany

97.

In cold places frost damage can be reduced in horticultural crops using these methods except

A

Overhead sprinklers at night

B

Green houses and shade nets

C

Wind breaks placement

D

Appropriate fungicide application

BiologyEasyBotany

98.

Horticulture is the study that includes

A

Fruits, vegetables and flowers

B

All food crops

C

Vegetable gardens and lawns near hotels only

D

Some bush crops and apples

BiologyEasyBotany

99.

Green manure plants used by farmers mainly belong to

A

Compositae

B

Leguminosae

C

Solanaceae

D

Poaceae

BiologyEasyBotany

100.

Green house effect is related to

A

Increased growth of green algae

B

Global warming

C

Cultivation of vegetables in house

D

Development of terrace gardens.

Botany in Biology : Practice MCQ Questions & Answers with Explanations