The brain loses 5-10 percent of its weight between the ages 20 & 90.
I guess it will be C: atoms and molecules because according to Jhon Dalton's
atomic theory :"all matter is made up of atoms"
and even if we think of other options think it by urself that not all matter is made up of them
This argument would not be valid because it fails to take into account the <u>mechanisms </u><u>through which </u><u>evolution </u><u>occurs</u> and misunderstands the <u>second law </u><u>of </u><u>thermodynamics</u><u>.</u>
The second law of thermodynamics states that the total entropy of a system must always increase. The argument stating that this law disproves evolution given that evolution can be considered as a <u>decrease in entropy</u>, fails to realize that the <em><u>second law</u></em> states that the <u>total entropy </u>must increase, this does not mean that entropy cannot decrease at one point, to then increase more so at another.
The other aspect of evolution that this argument fails to account for is that evolution is a chaotic process. Evolution, though having a final product that may be considered as increasing in organization, is at heart <u>a </u><u>chaotic process </u><u>caused by</u><u> random mutations</u><u> and the fragile process of </u><u>natural selection</u><u>.</u> Therefore, rather than disprove it, the<em><u> second law of thermodynamics</u></em> is actually the driving force behind continued evolution.
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This happens early in embryonic development in females, where one of the two X-Chromosomes is randomly (and permanently) inactivated, as you said, in cells other than egg cells.
This phenomonon is actually called X-Inactivation.
X-Inactivation make sure that females, just like males, have a single functional copy of the X Chromosome in each and every one of their cells in their body.
Glad I could help, byee now