Answer:
[ANSWER]
Explanation:
When a molecule moves down its concentration gradient is it participating in passive transport; moving up the concentration gradient requires energy making it active transport.
They only have one electron in their outer most shell which makes them very reactive.
Sugar is produced by photosynthesis.
C. The number of covalent bonds is equal to the number of unpaired valence electrons. For example, nitrogen and phosphorous both have 3 unpaired valence electrons thus forming 3 covalent bonds.
Answer:
the composition of a population gene can change over time through evolution
Explanation:
Nature selects