When conducting a scientific experiment, a(n) _____________ is tested.

A) theory
B) prediction
C) question
D) answer
E) null variable


A) theory

Biology & Microbiology

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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.

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology

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?

Biology & Microbiology