How can Leptospira interrogans be distinguished from other spirochetes?
A) It stains purple with the Gram stain.
B) One end of the bacterium looks like a question mark.
C) It is highly motile.
D) It can be found in multiple locations in the body.
E) It cannot be cultured on laboratory media.
B
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Whole agent vaccines may contain
A. viruses. B. bacteria. C. toxins. D. polysaccharides. E. viruses AND bacteria.
Which functional group is characteristic of organic acids such as acetic acid?
a. carbonyl group b. hydroxyl group c. phosphate group d. amino group e. carboxyl group
Which step is not involved with constructing a representative sample?
A. Collect the sample by randomly sampling from each stratum (defined by your pre-chosen independent variables). B. Run a t-test to check if the outcomes are different across stratums. C. Use information about the population to stratify (categorize) each of the chosen variables. D. Choose the independent variables you want to match.
In a pond, tadpoles eat algae and fish eat the tadpoles. Above the pond, grasshoppers eat grass and, at night, are preyed upon by bats. Other bats eat the fish that eat the tadpoles. In this community, the tadpoles are:
A. primary producers. B. primary consumers. C. secondary consumers. D. tertiary consumers. E. detritivores.