FREE NEET Biology Practice MCQ Test: Strategies For Enhancement In Food Production Exercise 4 Questions Answers With Detailed Explanations [PDF]

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Strategies For Enhancement In Food Production Topic Based

Question : 1

The sequential steps for breeding are

  1. Screening germplasm for resistance sources
  2. Selection and evaluation of hybrid
  3. Hybridization of selected parents
  4. Testing and release of new varieties

Answer: (c)

Question : 2

A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in

Answer: (d)

Polyploidy is the phenomenon of occurrence of more than two sets of chromosomes in the nucleus of a cell. Polyploidy is more common in plants. Polyploidy arises as a result of total non-disjunction of chromosomes during mitosis or meiosis.

Question : 3

Several South Indian states raise 2 to 3 crops of rice annually. The agronomic feature that makes this possible is because of

Answer: (c)

Question : 4

The new varieties of plants are produced by

Answer: (b)

Selection is picking up only those plants for reproduction which have desired qualities. Hybridization is crossing of two or more types of plants for bringing their traits together in the progeny. Introduction is taking a plant or a new variety from an area where it grows naturally to a region where it does not occur before.

Question : 5

Select the correct statement(s)-

  1. IARI has released a mustard variety rich in vitamin C.
  2. Pusa Sawani variety of Okra is resistant to aphids.
  3. Hairiness of leaves provides resistance to insect pests.
  4. Agriculture accounts for approximately 33% of India's GDP and employs nearly 62% of the population.

Answer: (c)

Question : 6

Which of the following statements about breeding is incorrect?

Answer: (b)

Inbreeding is mating of individuals closely related by ancestry. Inbreeding is used in developing pure lines or homozygous lines.

Question : 7

The sugarcane growing in North India and having a poor sugar content and yield is

Answer: (a)

The sugarcane, Saccharum barberi was originally grown in North India, but had poor sugar content and yield.

Question : 8

The host crop plants may be resistant to insect pests due to the

Answer: (d)

Question : 9

Find out the incorrect statement.

Answer: (d)

Question : 10

Which one of the following has maximum genetic diversity in India ?

Answer: (b)

Question : 11

In dairy farm management

Answer: (d)

Question : 12

Match the following columns.

Column I(Terms)

Column II(Features)

A. Pisciculture 1. Rearing of fishes
B. Aquaculture2. Rearing and management of economically useful aquatic plants and animals
C. Apiculture3. Concerned with maintenance of honeybees

Codes A B C

Answer: (d)

Question : 13

Match the following columns.

Column I(Terms)

Column II(Related to)

A. Blue revolution1. Fish
B. Green revolution2. Agriculture
C. White revolution 3. Milk

Codes A B C

Answer: (b)

Question : 14

The process of RNA interference has been used in the development of plants resistant to

Answer: (b)

RNA interference has been used to develop plants resistant to nematodes. RNA interference is a double stranded RNA (dsRNA) induced for gene silencing phenomenon.

Question : 15

Which of the following is the New World spice, that has become an essential part of Indian cuisine?

Answer: (b)

New World crops are those which have their centre of origin in America. Red pepper is the dried ripe fruits of Capsicum sp., indigenous to the American tropics and subtropics and the West Indies. It is a New World crop.

Question : 16

Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids?

Answer: (d)

Mackerel is a marine fish, rich in omega-3- fatty acids. Mystus, Mangur and Mrigala are freshwater fishes.

Question : 17

Which one of the following processes of breeding increases homozygosity?

Answer: (b)

Question : 18

Which one of the following pairs is wrongly matched?

Answer: (d)

Question : 19

In maize, hybrid vigour is exploited by

Answer: (b)

Hybridisation or heterosis or hybrid vigour is defined as superiority of hybrid over parents. It has been commercially exploited in different commercial crops like maize, sorghum, bajra, etc. The main steps include: selection of parents, selfing of parents, emasculation, bagging, crossing of desired and selected parents and finally seed setting and harvesting.

Question : 20

The way in which biotechnology is contributed to sustainable agriculture is

Answer: (d)

Sustainable agriculture is the preparation, management and successful use of bio - resources in agriculture to meet the present demand without compromising the ability of future generations to meet their own needs. The way in which biotechnology has contributed to sustainable agriculture is biofertilizers, bio - pesticides, single cell protein and disease and insect resistant varieties.

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