You look at a sample of tissue under the microscope. you determine the sample is not from an animal because the cells in the tissue have

a. nuclei.

b. cell membranes.

c. cell walls.

d. membrane-bound organelles.

What did hunter gathers do to alter the environment?

9. the history of life on earth is recorded in

Use the phylogenetic tree to the right to determine which statement below is true. organisms a and f are not related. organism e is more closely related to organism b than organism f. organisms c and d are more closely related than organisms a and b. phylogenetic trees