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प्रश्न
Selective breeding is a process of ______.
विकल्प
selecting the offspring with desired properties.
selecting the parents with desired properties.
selecting an area for breeding.
selecting fine hair for good quality wool.
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उत्तर
Selective breeding is a process of selecting the parents with desired properties.
Explanation:
Selective breeding is the process of crossing of two selected varieties having different traits to produce a hybrid having good traits of both, e.g., some breeds of sheep possess only soft under-hair. Their parents are specially selected to give birth to sheep which have only soft under-hair.
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संबंधित प्रश्न
Classify the following fibre as natural or synthetic:
nylon
Classify the following fibre as natural or synthetic:
silk
Yarn is made from fibres.
Animals fibres are ______ and ______.
When you place a natural fibre in a flame it ______.
A natural fibre is called ______.
A lady went to the market to buy a blanket. The shopkeeper showed her blankets made of acrylic fibres as well as made of wool. She preferred to buy an acrylic blanket. Can you guess why?
Match items in List A with the items of list B.
| List A | List B |
| (a) nylon | (i) non-stick coating |
| (b) PET | (ii) electric switches |
| (c) rayon | (iii) parachutes |
| (d) thermosetting plastics | (iv) polyester |
| (e) teflon | (v) artificial silk |
Unscramble the jumbled word given below, related to synthetic material.
Felton
The rearing of silkworms for obtaining silk is called ______.
