Which statement about the cell membrane is true?

1-it contains cellulose and sugars that are involved in communication.

2-it is present in animal cells only.

3-it is rigid and elastic for supporting the cell’s shape.

4-it prevents harmful substances from entering a cell.

Which set of terms best describes a community of miners who live out in the countryside of west virginia and use specialized geological equipment to analyze the composition of rock?

What are characteristics of minerals? select 3 choices

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.