13. In order to properly evaluate scientific research conclusions, one should utilize critical thinking by _____
determining the reliability of the source of the data
reading about the research methods and protocols used
trying to come up with other possible explanations for the results
all of the above
all of the above
Explanation: All of these, and more, are required if one is using critical thinking skills to evaluate the claims of a scientific researcher.
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Cilia in the trachea move mucus toward the ________.
A. epiglottis B. brinchioles
Why are severe burn patients at extreme risk of infection?
A) The skin is the first and primary barrier to preventing ingress of foreign substances. B) These patients have to stay in a hospital environment for a long time while being exposed to sick people. C) Most immune system cells are destroyed when the skin is damaged. D) The skin helps with the production of vitamin E, a necessary disease-fighting vitamin.
In most freshwater fish, nitrogenous waste is primarily excreted as ammonia, which is highly soluble in water and is toxic at low concentrations. In terrestrial mammals, ammonia is converted to urea before it is excreted. Urea is also highly soluble in water but is less toxic than ammonia at low concentrations. Which of the following best explains why freshwater fish do NOT convert ammonia to urea for excretion?
(A) The metabolic pathways of fish do not normally involve nitrogen consumption. (B) The dilution of ammonia by direct excretion into freshwater conserves energy. (C) Ammonia is concentrated in tissues, where it is stored prior to excretion. (D) The nitrogen in ammonia is recycled for use in protein and nucleotide synthesis.
The process of cell specialization within a multicellular organism is
A. cancer. B. cytokinesis. C. mitosis. D. determination.