Carbon is the sixth element in the periodic table. Located between boron (B) and nitrogen (N), it is a very stable element. Because it is stable, it can be found both by itself and in many naturally occurring compounds. Scientists describe the three states of carbon as diamond, amorphous, and graphite.
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Rhizoids can be called roots of bryophytes.
Rhizoids<span> are simple hair-like protuberances that extend from the lower </span>epidermal cells<span> of </span><span>bryophytes.
</span>Rhizoids are long, thin cells that anchor bryophytes in the ground <span>and absorb water and minerals. </span>
I think I understand your question, but you question has so many errors in it that it doesn't really make sense.
Random changes in allele frequency in a population are usually called genetic drift. The reason why this is the answer is because it is a very specific word which is used to describe exactly that - random changes in allele frequency.
All the other cases; answers, here aren't correct and don't apply.