Sulfide is toxic to respiring organisms, because it can combine with metals present in ________ that serve a critical function in respiration
A) glycolysis enzymes
B) oxidases
C) NADH
D) cytochromes
Answer: D
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The objective evaluation of information is called evidence-based learning or ____________________. Fill in the blank(s) with the appropriate word(s)
Which of the following organisms are major producers of oxygen by photosynthesis in the ocean?
A. Cyanobacteria B. Diatoms C. Dinoflagellates D. All of the above are important producers of oxygen.
Islet cells in the pancreas produce which hormone(s)?
A) Each cell produces either glucagon or insulin. B) They produce insulin only. C) Islet cells do not produce hormones. D) Each cell produces both glucagon and insulin. E) They produce glucagon only.
An unscrupulous dog breeder has been selecting for dogs that have very large litters, with the goal of maximizing profits. Why might this strategy be counterproductive?
A. Litter size is not influenced by genetics. B. Intrauterine cannibalism will reduce the number of puppies. C. The puppies from large litters are likely to be malnourished, and the mother will have few resources to devote to future litters. D. It will cost too much money to feed all those puppies.