What type of medium is used to demonstrate oxygen requirements of microbes?
A. Sulfite polymyxin sulfadiazine
B. Blood agar
C. Thioglycollate
D. Sodium chloride
Answer: C
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Defining and omitting a base group amongst a set of fixed effects is an attempt to remedy which identification challenge?
A. Perfect multicollinearity B. Imperfect multicollinearity C. The treatment variable is correlated with the error term. D. A control variable is correlated with the error term.
A deficiency in thiamin causes the nervous system disorder ____
a. beriberi b. pellagra c. rickets d. scurvy e. anemia
In 1882, the tropical volcanic island Krakatoa
exploded and was reduced to an abiotic island covered by a thick layer of volcanic ash. By 1933, populations of all of the following organisms were present. Which population was probably established after the others? a. ferns b. bacteria c. insects d. rodents e. mosses
The vast majority of animals are ____
a. mammals
b. invertebrates
c. vertebrates
d. birds
e. predators