According to the law of universal gravitation, gravity is the force keeping objects in the universe in their relative positions true or false

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

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.

Which of the following explains why a tree is often used as a model to represent the principle of common descent