4 ms·
This is like saying if all white dogs were killed, dogs evolved into black ones.
by FjolsvithAase 5y ago
This is like saying if all white dogs were killed, dogs evolved into black ones.
- MathMonkeyMan 5y agoI think that's how evolution works.
- FjolsvithAase 5y agoI thought that was "survival of the fittest".
- ceejayoz 5y agoIn this case, "fittest" has changed from "big tusks" to "no tusks", because of a change in their natural environment (a new, effective predator targeting tusked animals). Selection pressures change all the time like this.
- FjolsvithAase 5y agoThen how is it evolution? I thought evolution was where the DNA changed to create a new species, and took millions of years. These elephants already had DNA to not grow tusks because of environmental pressure. Its like dogs growing a winter coat when it gets cold. They don't become a new species during the winter.
- ceejayoz 5y agoYou're mixing up evolution and speciation. Certain breeds of dogs have evolved warm coats (through both natural and unnatural selection), but they can interbreed with, say, a short-haired chihuahua, which makes them still the same species. Selection is a mechanism for evolution, which can (but doesn't necessarily have to) lead to speciation.