What is the largest population that an ecsystem can support over time?

Explanation:

The largest number of individuals of a species that an environment can support and maintain for a long period of time.

answer; ///(b) it is composed of four protein chains and four heme groups;

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.