Explanation

A chromosome is made up of proteins and DNA organized into genes.

Each cell normally contains 23 pairs of chromosomes.

Explanation

Group O can donate red blood cells to anybody.

It's the universal donor.

Group kind O negative blood is occasionally called the generic blood donor type.

Only 7% of the population is O negative.

 ND23-4-2023

Explanation

The lifespan of a red blood cell is around 120 days.

Blood cells are made in the bone marrow.

Explanation

DNA (Deoxyribonucleic Acid) has a double helix structure,

which consists of two long strands of nucleotides twisted around each other.

This structure was discovered by James Watson and Francis Crick in 1953.

Explanation

Chemical energy is stored in a dry cell.

A dry cell is a device that converts chemical energy into electrical energy.

Chemical energy is the energy stored in the bonds of atoms and molecules.