If you eat a hamburger, you are mainly eating ground-up beef muscle. What levels of organization are represented in this ground-up muscle?
A) organism, population, and community
B) organ, organ system, and organism
C) organelle, cell, and tissue
D) tissue, organ, and organ system
Answer: C
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Listeria monocytogenes is a species of rod-shaped bacteria. How would L. monocytogenes be affected if its actin-like cytoskeletal proteins were no longer functional?
A. It will be less efficient at exchanging materials with its environment. B. It will be able to store more nutrients. C. It will be able to secrete mucilage and aggregate as part of a biofilm. D. It will no longer be able to undergo binary fission for reproduction. E. It will become a spirochaete.
How is movement in vertebrates analogous to the movement of a lever?
What will be an ideal response?
Contractions of the stomach muscles ____
a. decrease following a heavy meal b. move chyme to the small intestine c. begin the digestion of protein d. begin the digestion of lipids e. close the pyloric sphincter
Which of the following microbes has been genetically engineered to contain a protein that helps protect crops from freezing?
A) Deinococcus radiodurans B) Bacillus thuringiensis C) Pseudomonas D) Salmonella E) Escherichia coli