Bhetki,mullets,pearl spots and prawns are some of marine fish of high economic value.

Find out the wrong statement from the following:

$(a)$ State two differences between egg layers and broilers.
$(b)$ How can poultry fowl be prevented from various diseases? State any three methods.

Find out the correct sentence:
$(i)$ Hybridisation means crossing between genetically dissimilar plants.
$(ii)$ Cross between two varieties is called as interspecific 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.

While selecting a breed of crop,which characteristics of the crop are to be taken into account by the farmers?

Why is organic matter important for crop production?