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.
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<span>The correct answer to the question above is snapping turtle and rattlesnake. The snapping turtle and rattlesnake is a pair of organisms that is mostly closely related to primates. They are both reptiles and from the same classification.</span>
"Endarch is the arrangement in which the protoxylem is directed towards the centre and metaxylem elements towards the periphery."
"Exarch is the arrangement in which the protoxylem is directed towards the periphery and the metaxylem towards the centre."
-biology.lifeeasy.org