PRACTICE TEST - 1 - CHAPTER 12

Welcome to your Ncert - class 9- science - Chapter 12 – Improvement in Food Resources 1

What is hybridisation?

Introduction of new genes into a plant

None of the above

Crossing between genetically dissimilar plants

Fusion between male and female gametes

None

Crop rotation is employed for

Community development

Enhancing soil fertility

Checking soil erosion

Increasing nitrogen content of soil

None

Which of the following characteristic can be obtained when quality breeding is done?

Carrying out photosynthesis at night

Cropping without irrigation

Increased lifespan of crops by 10 years

Higher yields of crop in a shorter period of time

None

__________ is the practice of growing a series of different types of crops in the same area in subsequent seasons.

All of the above

Crop rotation

Manure farming

Soil erosion

None

Which of the following statements are correct regarding mixed cropping?

(I) There is a definite pattern of sowing seeds.

(ii) It increases biodiversity.

(iii) It removes some nutrients specifically.

(iv) Outbreaks of pests and diseases can spread very rapidly.

(v) The crops with different maturation times are grown together.

(vi) Same fertilizers and pesticides are used for all crops.

(vii) The risk of total crop failure due to uncertain monsoon is reduced.

(i), (ii), (v), (vi)

(ii), (v), (vi), (vii)

(i), (ii), (iv), (vii)

(iii), (iv), (v), (vi)

None

_________ is growing of two or more crops simultaneously on the same piece of land in a definite pattern.

Intercropping

All of the above

Terrace farming

Crop rotation

None

Which of the following methods of cultivation will result in the loss of soil fertility?

I.Crop rotation

II. Inter-cropping

III. Excessive use of chemical fertilizers

I and II only

I and III only

III only

I, II and Ill

None

Berseem and Sudan grass are grown to be used as

Green manure

Food for livestock

Manure

Food for humans

None

Which of the following is true for animal husbandry?

In addition to supplying milk, meat, eggs, wool and hides, animals, mainly bullocks, are the major source of power for farmers.

Both A and B

Animal husbandry is the management and care of farm animals by humans, in which genetic qualities and behaviour, considered to be advantageous to humans, are further developed.

Non of these

None

10.

Tallness and profuse branching are ideal for

Wheat

Rice

Both B and C

Fodder crops

None

11.

The method of incorporating desirable qualities in crop varieties is..

Multiple cropping

Hybridisation

Crop- rotation

Intercropping

None

12.

What will improve the quantity of food production

Optimum use of land for agriculture

Synthetic hormones

Pesticides

Education and guidance for consumers

None

13.

The organic manure is considered better than fertilisers because

It improves the texture of the soil.

It decreases the water holding capacity of the soil.

It can be prepared in the factories.

It is less rich in plant nutrient.

None

14.

Why is dwarfness preferred in cereal crops?

They would consume less minerals

All of the above

They would provide more yield

They would be resistant to pests

None

15.

What are genetically modified crops?

None of these

Plants containing genes that have been introduced into them

Plants having superior genes

Plants which are crossed with plants of different genera

None

16.

Identify the correctly matched pair.

Pisciculture - Silk moth

Aquaculture - Mosquito

Sericulture - Fish

Apiculture - Honey bee

None

17.

Which of the following is a food-fodder mixed farming system?

Growing fodder crops alone

Growing food crops alone

Growing crops which can be used as food and fodder by using more fertilizers.

Growing food crops and fodder crops in the same field

None

18.

Mixed farming involves combination of _____ with crop production.

Rearing of livestock

Fishing

Hunting

Bee keeping

None

19.

Which of the following states has the highest percentage of irrigated land?

Himachal Pradesh

Haryana

Punjab

Rajasthan

None

20.

Rotation of crops is carried out to

Increase convenience for the farmers

Increase in nitrogen content of the soil

Increase variation in the mineral content of soil

Increase diversity of plant habitats

None

Chapter 5- The Fundamental Unit of Life

Chapter 6 - Tissues

Chapter 12 – Improvement in Food Resources

Curriculum

Ncert - class -9 - Biology

Chapter 5- The Fundamental Unit of Life

Chapter 6 - Tissues

Chapter 12 – Improvement in Food Resources

PRACTICE TEST – 1 – CHAPTER 12 – CLASS 9