“There are certain portions, certain sections of the earth's surface which, in the wise economy of nature, must always be maintained as forests, and that our watersheds…
“There are certain portions, certain sections of the earth's surface which, in the wise economy of nature, must always be maintained as forests, and that our watersheds…
Slide 1 Darwinâs idea to explain evolution was natural selection. That: ⢠living things produce offspring which vary â they are not all the same, ⢠there is a shortage…