Alarge plant population may impose selective pressure on a smaller, isolated group of plants, resulting in a change in allele distribution. which mechanism is responsible for this change in the allele distribution? a. hybridization b. mutation c. genetic drift d. trait acquisition

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?