Answer:
D
Explanation:
This would assist in proving there were ice ages because it shows that cold adapted animals were living before, in what is now warm environments.
The answer would be C sand dune
Answer:
semi-permeable
Explanation:
passive transport is the movement of substances along the concentration gradient and no energy is utilized in it
Answer:
C. under 1 and 2. because Earth's entire outer layer is made of hard, solid rock
Explanation:
Just because 2 is under water does not mean it will not work it will just be very difficult. But at the bottom of the sea there is always solid rock.
Answer:
yes. a ecosystem consist of both biotic and abiotic factor
