Answer:
A is the answer. Explanation is in the photo
Isolation can be due to behavioral, geographical, or temporal barriers. <span>Speciation can take place in two general ways. A single species may change over time into a new form that is different enough to be considered a new species. This process is known as anagenesis. More commonly, a species may become split into two groups that no longer share the same gene pool. This process is known as cladogenesis. There are several ways in which anagenesis and cladogenesis may take place. In all cases, reproductive isolation occurs. Hope this helps! </span>
Answer:
Yersinia pestis is the causative agent of plague
Explanation:
Rodents, such as rats, carry the disease. It is spread by their fleas.
