Why does Hilary keep agreeing to baby-sit for the Mitchells, even though she feels uncomfortable there? Include specific words and phrases from the story to support your answer.

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.

Which prefix mean under less or below

Which of the following determines the specificity of a dna probe? a. type of radiation b. level of enzymatic activity c. number of neutrons d. complementary base pairing