The most likely identification of an anaerobic gram-positive bacillus that produces spores is:
a. Bifidobacterium.
b. Eubacterium.
c. Eggerthella.
d. Clostridium.
D
The clostridia are the endospore-forming, anaerobic, gram-positive bacilli.
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After conjugation between an F+ cell and an F- cell, does the F- cell remain as F- or does it become F+? After
conjugation between an Hfr cell and an F- cell, does the F- cell remain as F- or does it become F+? Explain each answer.
What will be an ideal response?Countercurrent exchange is used primarily in the hairpin arrangement of the ________ portion of the nephron
Fill in the blank(s) with correct word
Which of the following statements about DNA structure is false?
A: It is antiparallel. B: It has a uniform diameter. C: It is a double-stranded helix. D: The 3´end is phosphorylated. E: It is a right-handed helix.
Insects that lay eggs in or on another insect, called ____________, are often used in biological pest control.
A. parasitoids B. brood parasites C. commensal insects D. invaders E. hymenopterans