<span>A dichotomous key is very easy to use because it provides only two choices. </span>
Active transport, which occurs at the expense of energy.
Answer:
A
Explanation:
Because there are two DNA strands in the DNA molecule and they both rotate around each other in a helix formation. So two helixes = double helix.
Answer:
A mass
Explanation:
I learned it in 8th grade.
If the earth wasn't spinning , we wouldn't have summer, winter, fall, spring etc, it is important because we need the sun for certain seasons and no sun for others.
