I'm pretty sure the answer is B have a nice day
When molecules uses energy for transportation across the cell, then it is known as "Active Transport"
So, option B is your answer.
Hope this helps!
Bird skeletons are very delicate, and therefore, difficult to be preserved. The bones of the birds are soft. The small animals are very prone to physicochemical as well as biological decay. This is why the fossil record of bird is incomplete and well-preserved fossils of birds are rare to find, except at a few unusual sites.
Answer:
Going down Burr Hill; the contour lines are close together.
Explanation:
Between Points A and C, the steepest part is going down Burr Hill.
I know that, because the contour lines are so close together.
That means your vertical descent is quite steep compared to the distance you cover horizontally.
