What is the crop quality?

Find out the correct sentence.

(i) Hybridisation means crossing between genetically dissimilar plants

(ii) Cross between two varieties is called as inter specific hybridisation

(iii) Introducing genes of desired character into a plant gives genetically modified crop

(iv) Cross between plants of two species is called as inter varietal hybridisation

A hybrid is an animal or plant produced by individuals of different kinds or types. Scientists often produce a hybrid variety of a plant (or animal) by crossbreeding two varieties so that the hybrid may have the desirable characteristics of both the parent varieties. Perhaps you remember that Indian sheep are crossbred with exotic sheep to improve the quality and quantity of wool they produce. The technique of producing new varieties of a plant or animal by crossbreeding is called hybridisation.
Using hybridisation to ‘create’ high-yielding varieties of wheat and rice led to such a great increase in the production of these crops in India in the late 1960s and 1970s that this period is often called the Green Revolution. The yield of a crop means the quantity of the crop produced per unit area of land. It is measured in units such as tonnes per hectare. Some other factors that made the Green Revolution possible were the use of fertilisers and pesticides, improved irrigation and the use of modern farm equipment.

1. What is a hybrid?
2. How is hybridisation useful to us?
3. What is the yield of a crop?
4. What is referred to as the Green Revolution?
5. Which factors led to the Green Revolution?

Enlist the importance of Hybridisation.

The following details are regarding these three compounds: (A) ${\mathrm{N}}_2$, (B) ${\mathrm{N}}_2{\mathrm{H}}_4$ and (C) ${\mathrm{N}}_2{\mathrm{F}}_2$.

The bond-lengths (between $\mathrm{N}-$atoms) have been found as $1.45$ $\mathrm{\AA }$, $1.10$$\mathrm{\AA }$ and $1.22$ $\mathrm{\AA }$, but not in the correct order.

Which option represents the incorrect matching of compounds with their bond-lengths (between $\mathrm{N}-$atoms)?

Find out the correct sentence :

(i) Hybridization means crossing between genetically dissimilar plants.
(ii) Cross between two varieties is called as interspecific hybridization.
(iii) Introducing genes of desired character into a plant gives genetically modified crop.
(iv) Cross between plants of two species is called as inter varietal hybridization.

Find out the correct sentence:

(i) Hybridization means crossing between genetically dissimilar plants

(ii) Cross between two varieties is called interspecific hybridization 

(iii) Introducing genes of desired characters into a plant gives genetically modified crop