In 1859, Charles Darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. He defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".
Answer:Because of where they are from.
Explanation:
Geographic, or physical, barriers result in geographic isolation
Answer:
the answer is choice 2
Explanation:
plateaus are flat on the top I believe, and answer 2 has a flat top
Hope this helps :)
Answer:
a humongulous is simular in related organisims and analogous is simular in unrelated organisims
Explanation: i have already learned this
The pyramid shape has a top and a base so it makes since that the greater organism is centered closer to the top where the weaker is placed closer to the base
