Which statement is about weather and nor climate? A. The coolest month of the year in Dallas is usually January
B. Dallas has hot summers and generally mild winters,
C. The high temperature yesterday in Dallas was 24°C
D. In Dallas, it often reaches 40°C in the summer,

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:

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.