Collecting data without a specific hypothesis in mind is called
A. reductionism.
B. hypothesis testing.
C. discovery-based science.
D. theoretical.
E. All of these choices are correct.
C. discovery-based science.
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Microorganisms may aggregate and glue themselves to teeth to form dental plaque. This is an example of:
A. a biofilm B. a dentifrice C. halitosis D. a dontoid layer E. annealed enamel
Which of the following involves a positive feedback
system? a. temperature control b. labor and delivery of the fetus c. glucose concentration d. absorption of toxins e. muscle contraction
The muscles of your lower leg are arranged in antagonistic pairs so that you
A) can both flex and extend your leg. B) can stand upright. C) obtain a stronger contraction than you would with a single muscle. D) have a backup when one muscle is not strong enough.
Which of the following is a process by which an initial set of genes turns on a second set of regulatory genes, which eventually turns on a third set of genes?
A) the sonic hedgehog sequence B) the genetic cascade C) developmental chain reaction D) somite production E) gastrulation