Which of the following is true concerning energy flow through an ecosystem’s food chain? a. primary consumers collect their energy from the sun. b. the sun is the final receiver of energy in an ecosystem. c. energy is lost at each successive energy level in the chain. d. tertiary consumers account for the largest store of energy.

c. Energy is lost at each successive energy level in the chain.

materials water oxygen those are the things i can think of in this moment.

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.