What happens when an atom gains an electron?
a. it becomes a negative ion.
b. it has na increase in the number of protons.
c. it becomes a positive ion.
d. it has an increase in the number of neutrons.

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

Using meiosis, the sporophyte produces spores that are .

Evolution acts upon the population of organisms and not on each individual organism