The cell wall is made of cellulose
A. protection
B. support
C. transporting materials
D. reproduction

Acell in the human nervous system whose primary function is to form myelin and the blood-brain barrier, respond to injury, remove debris, and enhance learning and memory is called a(n) cell.

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes

Dna replication or repair occurs in a cell in all of thw following situations except when