Explanation

Water has maximum density at 4°C.

When Water is in its Solid form (Ice) below 0°C.

Explanation

Human blood is red because hemoglobin.

It is carried in the blood and functions to transport oxygen.

It is iron-rich and red in color.

Octopuses and horseshoe crabs have blue blood.

This is because the protein transporting oxygen in their blood, hemocyanin, is actually blue.

Explanation

A hutch is a type of cage used typically for housing domestic rabbits.

Other small animals can also be housed in hutches such as guinea pigs, ferrets,

Explanation

Nitrogen is a key component of amino acids, the building blocks of proteins.

Thus, in plants and animals, nitrogen mainly exists in the form of proteins.

Explanation

The lungs exchange gases — they absorb oxygen (O₂) and release carbon dioxide (CO₂).

This process is essential for respiration and energy production in the body.