Ash trees are being removed when they show signs of the ash borer, a parasite that affects the trees and kills them off. what best explains why the ash trees are being cut down? the ash borer is a density-independent limiting factor, and humans need to clear cut to control tree density. the ash borer is a density-dependent limiting factor and will start to spread to nearby healthy trees. ash trees are outcompeting other trees and are thus more affected by the ash borer. long periods of drought have caused an increase in the ash borer population.

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.