Explanation

The name of the fluid that fills the mitochondria is matrix.

The mitochondria have an outer membrane, an inner membrane, in the inner membrane, a gel-like fluid is present which is called a matrix.

A matrix is viscous.

Explanation

Vitamin A deficiency can cause both loss of appetite and night blindness.

It is also known to increase susceptibility to infections, including those in the throat. 

Night blindness

This is one of the earliest signs of vitamin A deficiency.

It is the inability to see well in low-light conditions, which is caused by the lack of a specific pigment needed for the retina to function properly. 

Loss of appetite

Vitamin A is involved in the health of the receptors for taste and smell.

When vitamin A is deficient, these senses can be altered, which leads to a reduced appetite and difficulty consuming enough nutrients. 

Explanation

Impassive means بے حس

Inscrutable means جس کو سمجھنا مشکل ہو

Explanation

Diamond is composed of a single element of carbon

It is the arrangement of the C atoms in the lattice

Diamond is a solid form of pure carbon with its atoms arranged in a crystal.