Which of the following structures within the chloroplast absorb light energy for photosynthesis? A. Photosystems I and II, predominately photosystem II

B. Thylakoids, predominantly grana

D. Chlorophylls, predominantly chlorophyll a

D. Photosystems I and II, predominately photosystem I

a polymer is a chainlike molecule made up of small molecular units. these small molecular units are called monomers. monomers of polymer can be joined together either naturally or synthetically.  

thermophiles, notice the prefix thermo.

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.