Which of the following would most likely interact by forming an ionic bond?
A.) the enzyme hexokinase and its substrate glucose
B.) ATP and magnesium cations
C.) two strands of DNA
D.) fatty acid chain and inorganic phosphate
E.) urea and water
Ans: B.) ATP and magnesium cations
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When Darwin observed several species of finches on the Galápagos Islands had unique beak characteristics, he compared them with finch beaks on the mainland. Which of the following studies use geographic distribution of extinct and living species to determine patterns of evolution?
A. Biology. B. Geology. C. Palentology. D. Geneology. E. Biogeography.
Teosinte was the forerunner of modern:
A. rice B. wheat C. oats D. barley E. maize
Which of the following components is never found in a virus particle?
a. protein b. DNA c. RNA d. ribosomes
Which of the following statements is FALSE?
a. Ecologist use models to represent relationships between biogeochemical cycles and most ecosystems. b. The physical environment has virtually no reservoir for most elements. c. Inputs from the physical environment and recycling made possible by decomposers and detritivores maintain the nutrient reserves in an ecosystem. d. In most major ecosystems, the amount of nutrients that is cycled within the ecosystem is greater than the amount entering or leaving the ecosystem in a given year. e. Once elements are in the biological part of the biochemical cycles, they are unlikely to leave until the organism dies.