Answer:
A closed system is a physical system that does not allow transfer of matter in or out of the system, though, in different contexts, such as physics, chemistry or engineering, the transfer of energy is or is not allowed.
Explanation:
All white blood cells are produced and derived from multipotent cells in the bone marrow known as hematopoietic stem cells. Leukocytes are found throughout the body, including the blood and lymphatic system.
Water <span>can cross the membrane in osmosis ....
Hope it helps!!!</span>
Answer: Mineralization
Explanation: Phosphorous cycle moves through the rocks, water, soil, sediments and organisms.
The weathering of rock releases phosphate ions and other minerals. Plants take up the phosphate from the soil. Phosphorous is present in the form of organic phosphate which is broken down by the help of microorganism in the form of inorganic phosphate.
This process is known as mineralization.
