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.

Biology & Microbiology

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The drug of choice to treat patients with V. cholerae is:

a. tetracycline. b. ceftazidime. c. imipenem. d. aztreonam.

Biology & Microbiology

Gymnosperms lack which structure found in angiosperms?

a. independent gametophytes b. pollen grains c. fruits d. roots e. leaves

Biology & Microbiology

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

Biology & Microbiology

________ is the male sex hormone responsible for secondary sexual characteristics.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology