Which of the following statements is true? the earth’s asthenosphere is made of solid rock. the earth’s inner mantle is made of solid rock. the earth’s inner mantle and asthenosphere are made of solid rock. the earth’s inner mantle and asthenosphere are made of liquid rock.

Which of the following is the best definition of a eukaryota? a. a one-celled organism that does not have a membrane-bound nucleus b. a one-celled organism that does not have a cell wall c. an organism whose cells each contain a membrane-bound nucleus d. an organism whose cells each have a cell wall