It happens when the two groups become sufficiently different and the two can no longer interbreed. A known example of speciation is the London underground mosquito where it formed a new species within the existing genus. There are examples in micro-evolution but not in macro-evolution.
1. to run
2. power cellular processes
3. to swim
Explanation:
It responds to big changes including changes in output from the sun, plate tectonic movements, and random asteroid impacts from space.
Explanation:
multipotent cells is the likely answer
Because it was to cold for them to plant and raise crops
