Almost as much evidence exists to support the hypothesis of transformation as the theory of common descent
Indicate whether the statement is true or false
FALSE
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A reaction is
(a) a reflex. (b) involuntary. (c) voluntary. (d) both a and b.
Which of the following are important features of carbon and the diversity of organic molecules?
A. Carbon can form up to 4 covalent bonds with other elements. B. Carbon bonds may occur in multiple different configurations such as linear, ringlike, and highly branched. C. Carbon can form both polar and nonpolar covalent bonds with various elements. D. Carbon bonds are stable at the range of temperatures associated with life. E. All the choices are correct.
Undersea landslides can disrupt marine habitats by burying organisms that live on the ocean floor. The graph above shows the size of a population of a certain organism that lives on the ocean floor. The population was affected by a recent landslide at the time indicated on the graph. Which of the following best predicts how the population will be affected by the landslide?
A) The surviving organisms will evolve into a new species. B) The reduced population will likely have allelic frequencies that are different from the initial population. C) The population will adapt to deeper waters to avoid future landslides. D) The reduced population will have a greater number of different genes than the initial population.
Which of the following statements about allostery is true?
(a) Allosteric regulators are often products of other chemical reactions in the same biochemical pathway. (b) Allosteric regulation is always used for negative regulation of enzyme activity. (c) Enzymes are the only types of proteins that are subject to allosteric regulation. (d) Binding of allosteric molecules usually locks an enzyme in its current conformation, such that the enzyme cannot adopt a different conformation.