__________are a group of cells that have a similar structure and act together to perform a specific function.

The_________is responsible for the biologival clock of the body.

Which part of eye is responsible for protecting the inner parts of eye?

The main role of_____________ is to refract the light that enters the eyes.

_____________is a watery fluid that is present in the area between the lens and the cornea.

The _____________ has fold of tissue which vibrate with the passage of air to produce sound.

The cilia and___________ trap dust and germs and prevent them from going deeper into the respiratory tract.

Cellular respiration is the process by which organisms break down _________into a form that the cell can use as energy.

In__________ the external solution concentration is less compared to the concentration of the inner solution of an organism.

_____________are tiny air sacs in the lungs that take up the oxygen we breathe in and keep your body going.