When conducting a scientific experiment, a(n) _____________ is tested.
A) theory
B) prediction
C) question
D) answer
E) null variable
A) theory
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Which of the statements below is true about
warfarin? a. It is a very effective rodenticide. b. It interferes with blood clotting in rats. c. Rats that are resistant to warfarin possess a gene that is rare among vulnerable rats. d. It is an agent of natural selection in rats. e. All of these are true.
Which of the following would NOT be found inside a Haversian (central) canal?
a. bone cell b. blood capillary c. nerve d. nutrients e. wastes
The genetic code is sometimes called “universal,” meaning that all organisms share the same:a
genes. b. coding mechanism. c. ribosomal structure. d. mitochondrial DNA. e. nucleic acid composition.
What are attributes of oral contraceptives? (Check all that apply.)A) They contain a progesterone and sometimes an estrogen analogue.B) The progesterone is in the 21-day pills, and the estrogen is in the 7-day pills.C) They help protect against ovarian and endometrial cancer.D) They are appropriate for use by smokers over age 35.E) They have a low failure rate of only 1% to 5% a year.F) They act by inhibiting LH and FSH secretion, inhibiting ovulation.
What will be an ideal response?