Answer:
The answer is A, Both have a crest and a trough.
Explanation:
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Answer:
Explanation:
Erythropoiesis is the process by which red blood cells, also known as erythrocytes, are made and are stimulated by decreased levels of oxygen in the blood, which sets into motion the secretion of erythropoietin, a hormone central to the formation of red blood cells
Before he uses the bathroom put baby wipes in there so he knows your clean