The Ptolemaic system was a geocentric system that postulated that the apparently irregular paths of the Sun, Moon, and planets were actually a combination of several regular circular motions seen in perspective from a stationary Earth.
Yes. A person comes across many colds in a year or a life time and produces antibodies for each. Babies get many colds in the first years and fewer as they <span>get older because they have made antibodies.</span>
Answer:
Ion pumps can be distinguished from ion channels on the basis that ion pumps actively transport ions against a concentration gradient, while ion channels allow ions to passively flow down a concentration gradient.
Explanation:
If you get a born you can but mustered because it has a cale in it.