In the scientific method, why is it crucial to start with a question before conducting the empirical analysis?
A. It motivates the specific variation in the treatment required to test the hypothesis.
B. Questions are easier to communicate than propositions.
C. It facilitates survey responses from subjects.
D. It makes writing the results easier.
Answer: A
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All of the following have bilateral symmetry except:
a. Nemertea. b. Phoronids. c. Ctenophora. d. Platyhelminthes.
Steroids ____
a. have no fatty-acid component b. consist of three rings c. have the same type of functional groups attached to them d. are a specialized type of wax e. are a specialized type of phospholipid
Part of a chromosome breaks away and then reattaches to the same chromosome in reverse orientation.
a. Crossing-over b. Inversion c. Translocation d. Nondisjunction e. Deletion
Active immunity may be induced in an individual by transfer of antibodies or T-lymphocytes from an actively immunized individual.
a. true b. false