True or false: the primary source of red blood cells in the adult human is the bone marrow in the shafts of the long bones.

The primary source of red blood cells in the adult human is the bone marrow in the shafts of the long bones.
The above statement is true

That is true tge cactus as a structural adaptation to its envirinment has it leaves reduced to spines. but this doesnt mean it cant produce food it produces food because of the presence of chlorophyll in its stem

Aneutral atom must have the same number of neutrons and protons? no, they must have the same number of protons and electrons