The answer would be A. the arrangement of DnA
The answer is letter D. The macronucleus is not exchanged during conjugation. <span>It normally contains the working duplicates/copies of genes necessary to support an enormous cell. Macronucleus is formed by a direct division of the polyploid nucleus right after conjugation then followed by series of internal gene replication that is not oftenly occurring in micronucleuse.</span>
Geographical isolation usually refers to <span>two populations of the same species being separated due to some type of physical barrier. This separation of population </span>occurs<span> when a body of water or land forms and divides a habitat. </span>Geographic isolation<span> of a species also can </span>occur<span> when animals migrate to an isolated island.</span>
<span>planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originate</span>
