Answer:
B. Theory
Explanation:
A theory can be changed as new information is discovered.
Answer:
add plants and trees
Explanation:
they help hold the soil in place because of their roots
Answer:
less of a chance for mutations
Explanation:
Answer: Divide each weight expressed
Explanation: If your first test is 20 percent of your grade, divide 20 by 100 to get 0.2. If your second test is worth 30 percent and your final test is worth 50 percent, divide 30 and 50 by 100 to get 0.3 and 0.5.