The example of ocean and lake stickleback fishes indicates that morphology can be altered by
A) changing only the sequences of protein-coding genes.
B) altering the expression of a gene that is associated with development in only some parts of the body.
C) environmental factors (such as pollution).
D) the elimination of a gene from a population, which leads to loss of the body armor.
Answer: B
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As the difference in reduction potential between a redox pair increases, the amount of free energy made available ________.
A. decreases B. remains the same C. increases D. cannot be determined
Glycolysis is a metabolic process that is done by all cells. However, not all cells make use of another metabolic process called the Krebs cycle. What does this tell you about the evolution of these processes?
A. As a metabolic process, glycolysis likely evolved prior to the Krebs cycle B. As a metabolic process, the Krebs cycle likely evolved prior to glycolysis C. Both the Krebs cycle and glycolysis likely evolved at the same time Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about evolution and time? What other information is related to the question? Choose Answer Do you have all necessary information to determine the relative importance of glycolysis and the Kreb’s cycle? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Fish and crustaceans are similar in that both use _____________ for gas exchange.
A. tracheal tubes B. gills C. the walls of the mantle cavity D. the moist surface of their skin E. lungs
Which of the following additions have been made to principles of the central dogma of biology?
A. DNA information cannot be converted into RNA information. B. RNA can be used to regulate gene function. C. Protein information can be converted into DNA information. D. DNA codes for proteins.