The most abundant compound in living cells is

The type of linkage present in carbohydrates is

Reproduction by the immature or larval stage of animals caused by the acceleration of maturation is called:

$RNA$ differs from $DNA$ in having

Animals spending winter in dormant conditions is referred to as:

Choose the correct option.
$x$ - More than $70$ percent of all the species recorded are animals.
$y$ - The number of algae species in the world is more than the combined total of the species of fishes,amphibians,reptiles,and mammals.
$z$ - India is one of the $15$ mega diversity countries of the world.