What type of cell retains the ability to divide repeatedly into any type of cell, thus allowing the body to repair and grow?

Stem cells.

Explanation:

Stem cells are cells that have unique ability to differentiate into specialised cells types ,this allowing the body to repair and grow. Stem cells also have the ability to renew cells to treat diseases. Stem cells can be isolated from the body in different ways depending on the type. Example stem cells can be taken from donor's bone marrow.

Stem cells therapy is usually done to get the cells for repair and treatment of disease.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

digestion

it excretes wastes