Secretion of silk gland comes through a small pore. This pore is situated on

Varieties developed by pureline method are

Breeding of crops with high levels of minerals, vitamins and proteins is called

A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called

Biodiversity loss occurs due to the reasons given below

$(i)$ Habitat loss and fragmentation

$(ii)$ Co-extinction

$(iii)$ Over-exploitation

$(iv)$ Alien species invasion

Identify the correct reasons