_[blank]_ are the materials that change in a chemical reaction, while _[blank]_ are the substances formed by changes in a chemical reaction. Which answer choice presents the correct words to complete this sentence?

Inputs; outputs
Outputs; inputs
Reactants; products
Products; reactants

reactants; products

Explanation:

if imagine that we are making a cake, reactants are the ingredients and products is the end result: the cake

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.

the sphincter muscles at the end of the digestive tract is the anus.