Lactic acid bacteria such as Lactococcus
A. produce catalase.
B. are obligate fermenters.
C. require anaerobic environments.
D. use oxygen as a final electron acceptor.
B
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If a gene has two alleles, and allele A has a frequency of 83%, then allele a has a frequency of ____
Fill in the blank with the appropriate word.
When the cell wall is removed from a Gram-negative bacterium without removing the outer membrane, the resulting form is called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
One currently accepted theory suggests that the bodies in the Oort cloud formed
a. near the present orbits of the terrestrial planets and were then ejected by them. b. near the present orbits of the Jovian planets and were then ejected by them. c. right there in the Oort cloud very far from the Sun.
Refer to the accompanying figure. Depolarization is indicated by the label:a
A b. B c. C d. D e. E