Chromosome are made up of two identical structures called the chromatid. No chromosomes aren’t always in pairs only during the notification cycle, because during DNA replication each DNA molecule makes an identical copy of itself and each strand is found in each chromatid that are bonded together by the centromere.
<span>Darwin believed the shape of the finch's beak was related to the food it ate. This is pretty simple obviously the first three wouldn't be the answer. </span>