The termite gut protist Mixotricha paradoxa has at least two kinds of bacteria attached to its outer surface. One kind is a spirochete that propels its host through the termite gut
A second type of bacteria synthesizes adenosine triphosphate (ATP), some of which is used by the spirochetes. The locomotion provided by the spirochetes introduces the ATP-producing bacteria to new food sources. Which term(s) is (are) applicable to the relationship between the two kinds of bacteria?
1. mutualism
2. parasitism
3. symbiosis
4. metabolic cooperation
A) 1 and 2
B) 2 and 3
C) 1, 3, and 4
D) 2, 3, and 4
C
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Usually growth of cells that do not pose a threat to surrounding tissues are termed
a. malignant. b. benign. c. metastatic. d. carcinogenic.
Carbohydrate digestion begins in the mouth and continues on into the small intestines. Explain the steps of carbohydrate digestion, including in your discussion why salivary amylase is nonfunctional in the stomach?
What will be an ideal response?
Cuvier, an anatomist and paleontologist,
proposed that a. all present-day organisms have descended, with adaptations, from one--or possibly a few--original organisms. b. the earth's history has been marked by several periods when destruction of populations was widespread and that, after each such period, the earth was repopulated. c. evolutionary changes in organisms are caused by use and disuse. d. although evolution is responsible for all the changes that happen to species, one center of creation resulted in the original members of each species. e. none of these are true
The step cycle of walking consists of
a. a stance phase. b. a swing phase. c. both a and b. d. none of the above.