What do the chemical reactions that occur during burning and rusting have in common? a. they are both reactions of a substance with water. b. they are both reactions of a substance with oxygen. c. they are both reactions that happen very quickly. d. they are both reactions that produce oxygen.

B. They are both reactions of a substance with oxygen

Explanation: Burning is oxidation of a substance in the presence of oxygen. Example: Burning of natural gas which mainly consists of methane is an example of a chemical reaction in methane is burnt in the presence of oxygen and is transformed into carbon dioxide, water vapor and ash.

Rusting is the oxidation of iron in the presence of air and water to lead to formation of hydrated ferric oxide called as rust.

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.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects