Which of the following statements is NOT TRUE?
a. Photons are packages of solar energy.
b. Each photon consists of a fixed amount of
energy.
c. The least energetic photons travel in longer
wavelengths.
d. Photons with different energy levels are
perceived as exhibiting different colors.
e. Photons of visible light have wavelengths longer
than 750 nanometers.
Answer: e
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In an inflammatory response, the direct effect of histamine is to ____
a. dilate blood vessels causing increased blood flow to the area of infection b. decrease heat accumulation in the area of infection c. directly kill bacteria d. attack cytotoxic T cells e. cause B cells to release antibodies
Which statement applies to artificial selection, but not natural selection?
A. Organisms are capable of producing more offspring than typically will survive. B. The phenotypic variation of a species can be increased very rapidly. C. Phenotypic variation can influence reproductive success. D. Phenotypic variation exists within populations. E. Phenotypic variation within a species is due in part to inherited characteristics.
Which statement is true about acids and bases?
A) Acids and bases do not react with each other. B) Acids mixed with bases neutralize each other. C) Acids mixed with bases make stronger acids. D) Acids mixed with bases make stronger bases. E) Acids are stronger than bases.
What observation(s) would distinguish a dividing animal cell from a dividing plant cell?
A) decondensing chromosomes positioned at opposite poles of the spindle B) a bipolar spindle constructed from microtubules C) the presence of centrioles would be a feature unique to plant cells D) a constriction in the plasma membrane forming along the spindle equator E) all of the choices are unique to animal cells