Most digestion in humans occurs in the first 25 centimeters of the 6-meter length of the small intestine called the ________.
A. colon
B. omasum
C. cecum
D. duodenum
E. jejunum
Answer: D
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Create an experiment where you would use both a Southern blot and a Northern blot to determine if a newly isolated bacterium contains and actively uses the same catabolic pathway as previously demonstrated
What is the value in doing the Southern blot first? With results from these experiments, how would you conclude if the same pathway is active or not? What will be an ideal response?
A cell cycle checkpoint at which phase would ensure sufficient nutrients for cell division were available?
a. S b. prophase c. metaphase d. G1 or G2 e. G1 or S
The sieve plate, stone canal, circular canal, and radial canals of a sea star are structures of the
a. nervous system. b. water-vascular system. c. digestive system. d. excretory system.
Reef systems
a. be all be destroyed within 30 years. b. are formed from calcium carbonate secreted by coral polyps. c. have symbiotic dinoflagellates in the living coral. d. have shown widespread bleaching; death of corals is being reported worldwide. e. include all of these.