Biology

The human body contains nearly ____ cells.

The scientific study of plants.

Which is not a major part of the respiratory system?

Another name for your voice box is the?

The hardest substance available on earth is

Most highly intelligent mammals are

Night blindness is cause by lack of which vitamin?

Plants receive their nutrients mainly from

Most abundant tissues of our body are

The scientific study of insects.

Photosynthesis generally takes place in which parts of the plant?

The scientific study of animal behavior.

The part of the human eye that controls how much light passes through the pupil is called the?

Plants absorb dissolved nitrates from soil and convert them into

What is the name of the biggest part of the human brain?

It shows how nutrients and energy are passed from creature to creature.

The outside layer of skin on the human body is called the?

Which of the following is used in pencils?

Ordinary table salt is sodium chloride. What is baking soda?

Ozone hole refers to

The average adult takes over ____ breaths a day.

Nymph is the name of young one of

It is the body's control center, receiving and sending signals to other organ.

Air is a/an

Pollen grains in plants are produced in

Radioactivity is a phenomenon of the spontaneous emission of

Who is the father of biology?

Allows us to take in vital oxygen and expel carbon dioxide in a process we call breathing.

The muscles found in the front of your thighs are known as what?

Nucleus was first discovered in 1831 by