Fill in the blanks.

There are ___ different amino acids

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

How is the carbon cycle related to global warming ?

According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously