When scientists set out to test a hypothesis, it is often most practical to try to prove the hypothesis false rather than to prove it is true in all cases. scientists place great confidence in cell theory, yet it has not been tested in every living thing on the planet. what piece of evidence would cause scientists to decide that cell theory would need to be revised? a. an organism was found with tissues made of something other than cells. b. a cell was found that could continue to divide and reproduce indefinitely. c. an animal cell was found that could harness solar energy as plant cells do. d. cells were found that used something other than dna as hereditary material.

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.

Along what geographical feature are most of the oil producing regions located