Rotifers obtain their food by the action of
a. tentacles.
b. cilia on the wheel organ.
c. a muscular pharynx.
d. pseudopodia.
d
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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
Which one of the following statements does not support the argument against multiple independent origins of eyes?
A. The light-sensitive molecule for all lightsensing cells is the same, a derivative of vitamin A complexed with a protein called opsin. B. Eye defects arise from Pax6 mutations in many different organisms. C. Pax6 DNA and protein sequences are highly conserved in a wide range of organisms. D. Pax6 protein is so central to eye development that after transferring the mouse Pax6 to the fruit fly, the fly produced eyes similar to that of a mouse. E. The Pax6 gene evolved early and is shared among a wide range of animals, despite the structural diversity in their final adult eyes.
All of the following traits are true of fibrous root systems except that they are not ________
a. adapted to take advantage of light rains b. typical of eudicots c. made up of both lateral and adventitious roots d. produced by grasses
©McGraw-Hill EducationA frog should be added to the phylogeny above at point
A. A. B. B. C. C. D. D. E. E.