Which type of population pyramid occurs in locations where fertility rates are high, death rates fall, and more people are middle aged with a longer life expectancy?
A) expansive population pyramid
B) constructive population pyramid
C) stabilizing population pyramid
D) directional population pyramid
E) stationary population pyramid

C) Stabilizing Population Pyramid

the population is stabilizing

Because the death rates are falling and life expectancy is longer, the population is stabilizing.

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:

answer; i believe the correct answer is (replication is not conservative);