Answer:
I believe the answer is C
Explanation:
I could be wrong.
I believe another term for Natural Selection, based off of the answers provided, I would say C, Survival of the Fittest.
Answer: A semi-permeable membrane is that which only allows certain
substances to pass through.
A DNA molecule consists of two strands of nucleotides twisted together to form a double helix. The sugar-phosphate backbone is found on the outside of this helix and the bases are found braching towards the middle. Hydrogen bonds join the thenitrogenous bases and hold the two strands together.
Therefore your answer is sugar and phosphate.
