How does a chemical equation with coefficients relate to the law of conservation of mass? A. The total mass must remain constant in a chemical reaction with coefficients in order for a physical change to occur
B. The number of atoms of each element must remain the same before and after a reaction in order for mass of the products to be the same as the mass of the reactants
C. The total mass of the reactants cannot equal the total mass of the products
D. The number of atoms in each element must change after the reaction in order for the mass to remain constant

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.

linnaeus is the father of taxonomy, which is the system of classifying and naming organisms. one of his contributions was the development of a hierarchical system of classification of nature. today, this system includes eight taxa: domain, kingdom, phylum, class, order, family, genus, and species.

answer; synapse;