Why does yogurt taste sharp?
A) It has not been aged long enough to mellow.
B) The taste is from the small amount of alcohol it contains, and alcohol tastes sharp.
C) The taste is from the large amount of carbon dioxide it contains, and carbon dioxide tastes sharp.
D) The taste is from the lactic acid it contains, and acids taste sharp.
D
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Oxidation and reduction reactions are chemical processes that result in a gain or loss of:
A. atoms. B. neutrons. C. electrons. D. molecules. E. protons.
In general, HPV causes
a. warts. b. pimples. c. moles. d. freckles. e. more than one of these.
Answer the following statements true (T) or false (F)
1.Human sperm swim to the egg. 2.The second stage of prenatal development is the fetal stage. 3.Stotting and mobbing are altruistic behaviors used by certain animals to warn others of danger. 4.Ethologists asking "why"-type questions in their studies are studying proximate causes of animal behavior. 5.Ethologists asking "how"-type questions in their studies are studying proximate causes of animal behavior.
Which of these biomes is one of the most biologically productive of all biomes?
A) open oceans B) estuaries C) temperate grasslands D) coniferous forests