Once supported by a predictable experimental outcome, a scientific hypothesis

a. still cannot be considered to have been proven true.
b. can be used to predict the outcome of all future similar events.
c is elevated to the status of theory.
d. is never reexamined.


Ans: a. still cannot be considered to have been proven true.

Biology & Microbiology

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Which feature can we use today to help explain natural phenomena that occurred in the past? a. All of these features can be used to explain natural phenomena that occurred in the past

b. Physical processes in operation today. c. We cannot use any features today to explain natural phenomena that occurred in the past. d. Biological processes in operation today. e. Chemical processes in operation today.

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Which of the following is true of Viagra? It

a. can cause hearing loss. b. can cause sudden headaches. c. can result in long sustained erections. d. is used to overcome complications due to circulatory problems. e. does all of these.

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The phase change of an apical meristem from the juvenile to the mature vegetative phase is often revealed by _____

A) a change in the morphology of the leaves produced B) the initiation of secondary growth C) a change in the orientation of preprophase bands and cytoplasmic microtubules in lateral meristems D) the activation of floral meristem identity genes

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Which of the following is a part of the immune system?

A) bone marrow B) liver C) pancreas D) lungs

Biology & Microbiology