Charles Darwin made use of artificial selection to help gather evidence for his proposed mechanism for how evolution occurs. Darwin was able to show that he could choose which traits were desirable for those to be passed down to the offspring by breeding 2 pigeons with the trait.
Electron microscope‘s differ from light microscope’s in that they produce an image of specimen by using a beam of electrons rather than a beam of light. Electrons have such a shorter wavelength than visible light, and this allows electron microscope to produce higher resolution images than standard light microscope‘s
Without a control group there wouldn’t be any basis for knowing if a result is due to the variable being tested
This is cyclic change because the population is consistently going up and back down.
A tsunami is associated a lot. Hope that helped dude! ( Or girl.)