1) Fiches,different beaks
2) Natural selection
3) The origin of species
4) Natural selection is chosen by nature according to who has the better genes
Don’t mind me just need to answer a question
Solid because it maintains their shape and is rigid
in this case the answer would be letter "D"
Answer:they won't for a pair
Explanation:Basically it all depends on process called complementary base pairing, the structure of thymine and adenine is such that it forms two hydrogen bonds and therefore pair up
2.guanine and cytosine have such structure that they form three hydrogen bonds and pair up
So Adenine complements only thymine and guanine complements cytosine and there aren't any chances of guanine pairing up with thymine.
