Chlorophyll is a naturally occurring chelate compound in which central metal is

Ozone hole refers to

Pollination is best defined as

Movement of cell against concentration gradient is called

Plants synthesis protein from

Plants absorb dissolved nitrates from soil and convert them into

Process of cell division can take place by

The nucleus of an atom consists of

Wind energy is harnessed as ______ energy with the help of windmill or turbine.

______ is the national currency of Russia.

What is the national currency of South Korea?

The national currency of Sri Lanka is ______.

The natural place of an organism or community is known as

Which statement is correct with respect to the food chain?

Which of the following requires maximum energy?

The ratio between energy flow at different points in a food chain is known as

The ability of a population to increase under ideal environmental conditions is called

In an ecosystem, the energy flow is always

Which of the following is a fat-soluble vitamin?

The pyramid of energy is always upright” states that

The upper part of an aquatic ecosystem contains