The invention of which instrument allowed scientists to discover cells?
a. eyeglasses
b. magnifying glass
c. microscope
d. telescope

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.

Tropical rain forests support more species per unit area than any other terrestrial ecosystem. what is one way rain forests are important to the health of the biosphere?

In the presence of oxygen, glycolysis is followed a. the krebs cycle b. lactic acid fermentation c. alcoholic fermentation d. photosynthesis