There would be 40 units of energy left, because 10% is lost each time.
Question 13 should be marine
Phosphate, Nitrogen, & Nucleotides
So the following is the answer to you following choices and I hope you are satisfied with my answer.
#2 by making new habitats available to them.
#3 convergent evolution.
#4 a species evolves at a slow, steady pace.
#5 <span> Global temperatures drop several degrees after several massive volcanic eruptions.</span>
Birds are carriers ( they can transport disease )
