Lipids are generally

The most abundant compound in living cells is

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.

Which of the cellular activities require energy?

The lowest level of organization among the following is:

Your body contains the smallest amount of which of the following elements?