Why precise measurements of reactants is important to form the desired production in a chemical reaction

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.

What does natural resource management aim at ?