How does catla differ from mrigal?

The level of vitamins $A$ and $K$ is kept high in poultry feeds.

Which one of the following species of honey bee is an Italian species?

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

$A$ teacher mentioned organisms that enrich the soil with nutrients. Rahila was curious to know more about them. She searched the internet and learned about $Rhizobium$ bacteria and cyanobacteria.
$(i)$ What are bio-fertilizers?
$(ii)$ Explain how any one of the organisms mentioned above enriches the soil with nutrients.
$(iii)$ Why was Rahila curious to get more information?

Distinguish between:
$(i)$ Inland fishery and marine fishery.
$(ii)$ Culture fishery and capture fishery.
$(iii)$ Apiculture and aquaculture.