The brain loses 5-10 percent of its weight between the ages 20 & 90.
Atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number.
Eukaryotes are larger cells with membrane-bounded organelles. Prokarotes are not that large and do not have a nucleus or any memberane-bound organelles.
<span> One pair of sex chromosomes and 22 pairs of autosomes
that should be right. please let me know if it is
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