Answer:
<h2>
<em>Reed–Sternberg cell</em></h2>
Explanation:
As the diagnosis of Hodgkin lymphoma is sometimes confirmed by the presence of a type of cell called a <em><u>Reed-Sternberg cell.</u></em>
<span>a mature haploid male or female germ cell that is able to unite with another of the opposite sex in sexual reproduction to form a zygote. b.
</span>
The answer is coevolution.
Coevolution is a change in <span>one species that results from a change in another species that it interacts with. For example, some species of orchid and African moth coevolved. That was a consequence of African moths' dependence on flower nectar and the orchids' dependence on moths' help in pollination. This two species coevolved, therefore the orchids have deep flowers while African moths have long proboscides.</span>
