Digestion of protein begins in the
A. mouth.
B. stomach.
C. duodenum.
D. small intestine.
B. stomach.
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Which of the following statements best describes our understanding of the role of condensins during cell division?
A. Condensins form rosettes of supercoiled DNA. B. Condensins form solenoid shaped supercoiled DNA. C. Using ATP, condensins form rosettes of supercoiled DNA. D. Using ATP, condensins form solenoid-shaped supercoiled DNA. E. In association with topoisomerase I, condensins stabilize nicked DNA.
One currently accepted theory suggests that the bodies in the Oort cloud formed
a. near the present orbits of the terrestrial planets and were then ejected by them. b. near the present orbits of the Jovian planets and were then ejected by them. c. right there in the Oort cloud very far from the Sun.
Many plants have fungi in a close symbiotic relationship with the plant roots. These are
a. root nodules. b. mycorrhizae. c. parenchyma. d. sclerenchyma. e. stomata.
Which of the following elements favors
fossilization?
a. death in an isolated area b. rapid burial c. a bony skeleton d. all of these elements favor fossilization e. one or more of these is an element that does NOT favor fossilization