Describe how a scientific hypothesis is different from a scientific theory.
A hypothesis is a yet untested explanation for a phenomenon, whereas a theory is a repeatedly-tested and widely accepted explanation for a phenomenon.
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Which of the following is NOT an immunoglobin?
A) IgA B) IgC C) IgD D) IgG
Isolates from an ear swab that are gram-negative coccobacilli grow on chocolate agar in CO2 but not blood agar, require both X and V factors for growth, and are nonhemolytic on rabbit or horse blood may be identified as:
a. H. parainfluenzae. b. H. ducreyi. c. H. aphrophilus. d. H. influenzae.
Sexual reproduction is what?
What will be an ideal response?
When chloroplast pigments absorb light, _____.
a. they become reduced b. they lose potential energy c. their electrons become excited d. the Calvin cycle is triggered e. their photons become excited