Darwin's theory. 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".
Plants that live in the cold desert include the sego lily, different types of grasses, bitterbrush, rabbit brush, and sage brush.
Answer:
Mendel noted the ratio of white flowered plants to purple-flowered plants was about 3:1. That is, for every three purple-flowered plants, there was one white flowered plant.
Explanation:
One small change in an ecosystem can lead to drastic results
Hope this helps!
-Payshence
The 3 main regions of the brain are the cerebrum, cerebellum, brainstem.
