Strategies for Enhancement in Food Production

NEET Biology · 50 questions · Page 2 of 5 · Click an option or "Show Solution" to reveal answer

Q11

A new breed Hisardale of sheep was formed using Bikaneri ewes and Marino rams by:

A Out crossing

B Mutational breeding

C Inbreeding

D Cross breeding

Correct Answer

Option D

Solution

Hisardale is developed in Punjab by crossing Bikaneri ewes and Marino rams.

This is cross-breeding between different breeds.

Q12

Select the incorrect statement about inbreeding.

A Inbreeding selects harmful recessive genes that reduce fertility and productivity

B Inbreeding helps in accumulation of superior genes and elimination of undesirable genes

C Inbreeding increases homozygosity

D Inbreeding is essential to evolve purelines in any animal

Correct Answer

Option A

Solution

Inbreeding exposes harmful recessive genes (not selects them to persist).

Continuous inbreeding can lead to inbreeding depression.

Q13

Which of the following is true for Golden rice?

A It is drought tolerant, developed using Agrobacterium vector

B It has yellow grains, because of a gene from a primitive variety of rice

C It is Vitamin A enriched, with a gene from daffodil

D It is pest resistant, with a gene from Bacillus thuringiensis

Correct Answer

Option C

Solution

Golden rice is enriched with Vitamin A; the gene was taken from daffodils (Narcissus).

Q14

Artificial selection to obtain cows yielding higher milk output represents:

A directional selection as it pushes the mean of the character in one direction

B stabilizing followed by disruptive selection

C disruptive selection as it splits the population into two

D stabilizing selection as it stabilizes this character

Correct Answer

Option A

Solution

Artificial selection to obtain higher milk yield shifts the peak to one direction - this is directional selection.

Q15

Homozygous purelines in cattle can be obtained by:

A mating of related individuals of same breed

B mating of individuals of different species

C mating of individuals of different breed

D mating of unrelated individuals of same breed

Correct Answer

Option A

Solution

Inbreeding (mating related individuals of same breed) increases homozygosity, giving homozygous purelines.

Q16

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

A Mangur

B Mystus

C Mackerel

D Mrigala

Correct Answer

Option C

Solution

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

Q17

A true breeding plant is:

A produced due to cross-pollination among unrelated plants

B one that is able to breed on its own

C near homozygous and produces offspring of its own kind

D always homozygous recessive in its genetic constitution

Correct Answer

Option C

Solution

A true breeding plant is near homozygous and produces offspring of its own kind upon self-pollination.

Q18

Interspecific hybridisation is the mating of

A animals within same breed without having common ancestors

B superior males and females of different breeds

C more closely related individuals within same breed for 4-6 generations

D two different related species

Correct Answer

Option D

Solution

In interspecific hybridisation, a species is mated with a different related species of the same genus.

Q19

A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called:

A Shifting agriculture

B Strip farming

C Ley farming

D Contour farming

Correct Answer

Option C

Solution

Ley farming is the growing of grass or legumes in rotation with grain or tilled crops as a soil conservation measure.

Q20

A protoplast is a cell:

A undergoing division

B without plasma membrane

C without nucleus

D without cell wall

Correct Answer

Option D

Solution

A protoplast is a cell without a cell wall (cell wall removed enzymatically).

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