The proteobacterium Rhizobium lives in a close association with legume roots, providing a source of nitrogen for the plant. In return, the plant provides Rhizobium with food produced by photosynthesis. In this relationship, Rhizobium is an example of a(n):

A. pathogen
B. parasite
C. producer
D. methanogen
E. mutualist


E. mutualist

Biology & Microbiology

You might also like to view...

Since energy cannot be created, which arrow represents the energy that will be converted to chemical energy the chameleon can later use?

A. Arrow A, the tongue extending B. Arrow B, the insect being eaten C. Arrow C, sunlight striking the chameleon D. Arrow D, heat radiating from the chameleon

Biology & Microbiology

Which of the following is a way to prevent attenuation and maintain virulence in a bacterium?

A) laboratory subculture B) animal passage C) polymerase chain reaction (PCR) D) antibiotic therapy

Biology & Microbiology

The plant hormone ____ is apparently synthesized from carotenoid pigments inside plastids

a. salicylic acid b. cytokinin c. abscisic acid d. jasmonate e. brassinosteroid

Biology & Microbiology

Which of the following statements concerning

production of bryophyte reproductive cells is true? a. Spores and gametes are produced by meiosis. b. Spores and gametes are produced by mitosis. c. Spores are produced by meiosis, whereas gametes are produced by mitosis. d. Spores are produced by mitosis, whereas gametes are produced by meiosis. e. Spores and gametes are both used for sexual reproduction.

Biology & Microbiology