Which number identifies a sequence that is transcribed but not translated?
a. 2
b. 3
c. 4
d. 5
e. 6
E
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The outcome of cleavage during embryonic development is the production of a
A. blastula. B. gastrula. C. neurula. D. substantially larger embryo. E. None of the choices are correct.
Exotoxins are ________.
A. antiphagocytic factors B. lipopolysaccharides C. proteins secreted by living bacterial cells D. secretions that always target nervous tissue E. only released after a cell is damaged or lysed
Nitrogen-fixing bacteria in the roots of soybeans help provide a source of nitrogen to the plants, and in exchange, the bacteria obtain food from the plants. Which type of interaction is this?
A. mutualism B. commensalism C. parasitism D. predation E. herbivory
Some bacteria are resistant to antimicrobials due to the activity of ________, which removes many of them
A) plasmids B) porins C) efflux pumps D) lipopolysaccharides E) ribosomes