You will be learning much about evolution in this course. A friend says to you that evolution isn't true because it's "just a theory." How would you respond to this?
What will be an ideal response?
A theory in science can be defined as a general principle about the natural world that is supported by many observations, experiments, and facts. Evolution can be shown to be a dynamic, unifying idea in biology supported by fossil evidence, the unity we see in living things, and many experimental studies.
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The drug of choice to treat patients with V. cholerae is:
a. tetracycline. b. ceftazidime. c. imipenem. d. aztreonam.
Gymnosperms lack which structure found in angiosperms?
a. independent gametophytes b. pollen grains c. fruits d. roots e. leaves
All of the following are used to construct a
theory with one exception. Select the exception.
a. repetitions of experiments. b. increased observations. c. time. d. faith. e. confirmation by many scientists
________ is the male sex hormone responsible for secondary sexual characteristics.
Fill in the blank(s) with the appropriate word(s).