Explanation

The number of bones in a human skull is 22

The human skull is generally considered to consist of twenty-two bones

• eight cranial bones
• fourteen facial skeleton bones

**

while

300 bones are there in a newborn infant.

The human hand has 27 bones

Explanation

Oxygen is the most abundant bio-element in living organisms.

It mainly due to its presence in water and organic molecules.

It makes up about 65% of the human body by mass.

Explanation

Tertiary consumers are at the top of the food chain and feed on secondary consumers.

Lion, tiger, and hawk are carnivores that eat other carnivores or herbivores.

Explanation

Cyclic ethers containing two ether groups are called crown ethers.

These compounds have a ring structure with multiple oxygen atoms, forming a "crown-like" shape that can bind to metal ions. 

Explanation

The kinetic molecular theory states that gases are made up of small particles called molecules.

These molecules are in constant random motion and collide with each other and the container walls.

Explanation

A compound is a pure substance formed when two or more different elements chemically combine in a fixed ratio.

Examples include water (H₂O) and carbon dioxide (CO₂).

Explanation

Polychromatic light contains multiple wavelengths or colors of radiation.

It is the opposite of monochromatic light, which has only a single wavelength.

Explanation

An alkali is a base that dissolves in water to give hydroxide (OH⁻) ions.

Common examples include sodium hydroxide (NaOH) and potassium hydroxide (KOH).

Explanation

Monosaccharides are the simplest form of carbohydrates.

They are called simple sugars because they cannot be broken down into smaller sugar units.

Explanation

Vitamin D helps the body absorb calcium from the intestines.

It regulates blood calcium levels by enhancing calcium absorption and reducing calcium loss from bones.