1) A. Biological
2) D. Model
3) B. Cold
Answer:
Tundra
Explanation:
Permafrost is a layer just beneath the surface of the ground that never thaws.
Answer: They adapted to the enviroment and are ment to grow in cold weather rather than warm.
Explanation:
Answer:
increase
Explanation:
As water and ions are lost through exercise, overall blood volume can decrease. To maintain adequate blood volume and blood pressure, renin is secreted to help in the conversion of angiotensin I to angiotensin II. This will cause vessels to constrict and sodium and water to be retained by the kidneys.
