<span>The answer is True. Doppler Effect is defined as “the change( increase of decrease) found in wave, sounds or light as the soure and observer slowly walks away. Examples of this would be ripples formed when ducks are swimming in the lake or the sound of the sirens, going higher as they moved to another destination</span>
A. Natural Selection. This is because the weeds that are not resistant to it die out before they can reproduce, but the resistant ones grow to maturity and then reproduce, passing down the resistance gene. Over time, the resistance gene would become a normal thing in weeds, while the non-resistant gene would not exist anyone, since the gene could not be passed on.
Darwin's "Origin of Species" and Lamark's "Theory of Inherited Characteristics"
<span>Parkinson's Disease if im wrong tell me</span>
Frogs have only one opening, called the cloaca, through which both feces and urine pass. Humans, however, possess two separate orifices for urine and feces to exit through.