In the chemical process of photosynthesis, sunlight is primarily considered a(n)
a)
catalyst.
b)
enzyme.
c)
product.
d)
reactant.

The answer would be:

D. Reactant

In photosynthesis, light energy is considered as a reactant. The reactants of photosynthesis include, water, carbon dioxide and light energy. The sun provides the light energy needed, which is absorbed by the chloroplasts.

This is the chemical equation of photosynthesis:

12H20 + 6CO2 + light energy → C6H12O6 + 6H2O + 6O2

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.