The solid portion of the Earth includes the crust, the mantle, and the inner core. Which of following elements is abundant in the solid portion of the Earth?
argon oxygen silicon iron carbon

Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is

The structure that houses the cells genetic information.

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.