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 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 only
B)1 and 2
C)2 and 3
D)1, 3, and 4
E)all four terms

Question

Quizplus · Accepted Answer

Mutualism is applicable because both types of bacteria benefit from the relationship. Symbiosis is also applicable because they live together in close physical association. Parasitism is not applicable because neither type of bacteria harms the other. Metabolic cooperation is applicable because one type of bacteria produces ATP that is used by the other type to move. Therefore, the best choice of terms to describe the relationship between the two types of bacteria is 1 (mutualism), 3 (symbiosis), and 4 (metabolic cooperation), which are all included in choice D.

The Termite Gut Protist, Mixotricha Paradoxa, Has at Least Two