Which best describes the cell theory?
o
scientists know all there is to know about cells, so the cell theory will not change.
as technological advancements are made, the cell theory may change.
a theory, once formulated, cannot be changed.
the development of a synthetic cell has caused the cell theory to change.

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen