ExamGOAL
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31

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Explanation
32

A few statements are given below followed by a set of terms in a box. Pick the correct term and write it against the appropriate statement

(a) Mating of closely related individuals within the same breed. (i) Cross
(b) Mating of animals of same breed but having no common ancestors on either side for 4-6 generations. (ii) Inter-specific
(c) Mating of animals of two different species. (iii) Outbreeding
(d) Breeding of animals belonging to different breeds. (iv) Outcrossing
(v) Inbreeding
Explanation

(a) Mating of closely related individuals within the same breed is called inbreeding.

(b) Mating of animals of same breed but having no common ancestors on either side for 4-6 generations is called outbreeding.

(c) Mating of animals of two different species is called interspecific hybridisation.

(d) Breeding of animals belonging to different breeds is called cross-breeding.

33

What is meant by 'hidden hunger'?

Explanation

Consumption of food deficient in nutrients particularly, micronutrients, proteins and vitamins is called 'hidden hunger'.

34

Why are plants obtained by protoplast culture called somatic hybrids?

Explanation

Plants obtained by protoplast culture are called somatic hybrids because they are formed by the fusion of isolated protoplasts from two different varieties of plants, each having a desirable character, to obtain a hybrid protoplast which can be further grown to form a plant.

35

What is protoplast fusion?

Explanation

The ability of protoplasts obtained from two different cells to fuse and form a hybrid protoplast is called protoplast fusion.