Improvement in Food Resources Test

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Improvement in Food Resources Test - 12

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Weekly Quiz Competition

Question 1
1 / -0

Intervarietal hybridisation is the process of crossing

A
different varieties of plants

B
the same variety of plants

C
two different divisions of same kingdom

D
two different divisions of different kingdoms

Solution

Intervarietal hybridisation is a process in which crossing is carried out between different varieties of plants.

Hence, the correct answer is option A.
Question 2
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Variety improvement of plants is carried out to produce plants that

A
have lower yield

B
have longer life cycle

C
can tolerate environmental stress

D
are less adaptable to different environments

Solution

Variety improvement of plants is carried out to obtain plants that can tolerate biotic stresses such as diseases, insects, and nematodes and abiotic stresses such as drought, salinity, heat, and cold.

Hence,the correct answer is option C.

Why alternative A is wrong:

Variety improvement of plants is carried out to obtain plants that have higher yield.

Why alternative B is wrong:

Variety improvement of plants is carried out to obtain plants that have a shorter life cycle. This allows farmers to grow multiple rounds of crops.

Why alternative D is wrong:

Variety improvement of plants is carried out to obtain plants that are adaptable to a wide range of environmental conditions.
Question 3
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Various factors can affect the yield of crops. Which of the following factors favours higher crop yield?

A
Poor soil quality

B
High soil salinity

C
High quality seeds

D
Poor water availability

Solution

Use of high quality seeds in agricultural practises can lead to an increase in the net yield of crops.

Hence,the correct answer is option C.

Why alternatives A, B and D are wrong:

Factors such as high soil salinity, poor soil quality, and poor water availability can decrease the yield of crops.
Question 4
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Manure is prepared by decomposing animal excreta and plant waste. Which of the following statements about manure is correct?

A
Manure enriches the soil with inorganic matter

B
Excessive use of manure can lead to water pollution

C
Manure increases the water-holding capacity of soil

D
Excessive use of manure can decrease the fertility of soil

Solution

Manure adds organic matter to soil, which increases the water-holding capacity of soil.

The correct answer is C.

Why alternative A is wrong:

Manure adds organic matter to soil.

Why alternatives B and D are wrong:

Manure consists of biological wastes, which do not decrease the fertility of soil or cause water pollution.
Question 5
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Plants obtain some nutrients from air. Which of the following nutrients is taken up by plants from air?

A
Carbon

B
Hydrogen

C
Sulphur

D
Copper

Solution

Plants take up carbon from air.

Hence,the correct answer is option A.

Why alternative B is wrong:

Plants obtain hydrogen from water.

Why alternatives C and D are wrong:

Plants obtain sulphur and copper from soil.
Question 6
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Manure differs from fertilizers because it

A
contains a large amount of inorganic matter

B
contains a large amount of organic matter

C
reduces the fertility of soil

D
causes water pollution

Solution

Manure contains a large amount of organic matter as compared to fertilizers, which do not contain any organic matter.

Hence,the correct answer is option B.

Why alternative A is wrong:

Manure does not contain a large amount of inorganic matter.

Why alternatives C and D are wrong:

Manure neither leads to water pollution nor does it reduce soil fertility.
Question 7
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Which of the following statements about fertilizers is incorrect?

A
They provide nutrients such as nitrogen and phosphorus to plants

B
They promote good vegetative growth in plants

C
They are manufactured commercially

D
They can be applied at any time

Solution

Fertilizers cannot be applied to crops at any time. They are applied at a particular time and in a particular quantity.

Hence,the correct answer is option D.
Question 8
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Use the following information to answer the next question.

There are different kinds of irrigation systems such as canals, wells, rivers and tanks.

Which irrigation system taps water from the deeper strata of soil?

A
Tube wells

B
Dug wells

C
Tanks

D
Canals

Solution

Tube wells tap water from the deeper strata of soil.

Hence,the correct answer is option A.

Why alternative B is wrong:

Dug wells collect water from the water-bearing strata.

Why alternative C is wrong:

Tanks are small storage reservoirs that intercept and store the run-off water from smaller catchment areas.

Why alternative D is wrong:

Canals are elaborate and extensive irrigation systems that receive water from reservoirs or rivers.

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Re-Attempt Weekly Quiz Competition

Improvement in Food Resources Test - 12

Result

Improvement in Food Resources Test - 12

Score

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Rank

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SHARING IS CARING

Question 1

different varieties of plants

the same variety of plants

two different divisions of same kingdom

two different divisions of different kingdoms

Solution

Question 2

have lower yield

have longer life cycle

can tolerate environmental stress

are less adaptable to different environments

Solution

Question 3

Poor soil quality

High soil salinity

High quality seeds

Poor water availability

Solution

Question 4

Manure enriches the soil with inorganic matter

Excessive use of manure can lead to water pollution

Manure increases the water-holding capacity of soil

Excessive use of manure can decrease the fertility of soil

Solution

Question 5

Carbon

Hydrogen

Sulphur

Copper

Solution

Question 6

contains a large amount of inorganic matter

contains a large amount of organic matter

reduces the fertility of soil

causes water pollution

Solution

Question 7

They provide nutrients such as nitrogen and phosphorus to plants

They promote good vegetative growth in plants

They are manufactured commercially

They can be applied at any time

Solution

Question 8

Tube wells

Dug wells

Tanks

Canals

Solution

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