Primary consumers of the vent communities include all except
a. clams.
b. fish.
c. mussels.
d. worms.
e. shrimp.
B
Biology & Microbiology
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Who is credited with demonstrating unidirectional and nonreciprocal transfer of DNA between two mating E. coli cells?
A. Tatum B. Hayes C. Lederberg D. None of the choices are correct.
Biology & Microbiology
In animals, a sphere of embryonic cells surrounding a fluid-filled cavity is called a
A. coelom. B. blastula. C. gastrula. D. hydrostatic skeleton. E. gastrovascular cavity
Biology & Microbiology
When a bacterium acquires a trait from its temperate phage, it is called ________.
A. transcription B. lysogenic conversion C. transformation D. viral persistence E. translation
Biology & Microbiology
Which cells target parasites and worms?
a. eosinophils b. B and T cells c. macrophages d. phagocytes e. cytokines
Biology & Microbiology