In an experiment, there are two groups. Which group is not changed in any way? A. hypothesis
B. variable
C. experimental
D. control

Of your good in bio kusing a series of preliminary observations; pstate a problem developed from these observations, formulate a hypothesis, design an experiment to test the hypothesis

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above