Answer: Erythropoiesis is the process which produces red blood cells (erythrocytes). It is stimulated by decreasing oxygen in circulation detected by the kidney which then secrete erythropoietin that proliferate and differentiate red blood precursors & produce red blood cells.
Explanation: The use of erythropoietin to boost red blood cells is called blood doping. The more red blood cells are present in the body, the more the energy expenditure and the slower you will burn calories during physical activities.
The answer would be plant. There is a kingdom called plantae, where all plant-like organisms fall, which means tree is under it. Birds and humans are under another kingdom called Animalia.
Cell walls are made out of cellulose and they give a sturdy structure to the cells (if you notice they have a rectangular shape)
Theory because a theory is a well substantiated explanation of how a particular phenomenon works based on the set of facts which had been repeatedly confirmed through observations and experiments. A scientific theory gives reliable account of a phenomenon.
The answer would be dominant
