Which of these describes a method in studying plate movements? Collect common fossil evidence from the South American and African plates Examine the age of a mountain structure on the African plate only Match the size and shape of rocks on the north and south edges of Australia Match the rotation of Earth to plate movement

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:

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

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