The bacteria that Griffith experimented with were termed R and S bacteria because
A. of the way they grew on artificial media.
B. the R bacteria formed rough-appearing colonies.
C. the S bacteria formed smooth-appearing colonies.
D. the S bacteria had a polysaccharide capsule.
E. All of the answer choices are correct.
E. All of the answer choices are correct.
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Which one of the following is NOT one of the general classes of macromolecules that are necessary for cellular function?
A. Nucleic acids B. Proteins C. Ions D. Carbohydrates E. Lipids
Which of the following statements best describes characteristics of Platyhelminthes?
A. They are acoelomate. B. They are triploblastic. C. They have an incomplete digestive system. D. They respire by diffusion of gases through the body wall. E. All the choices provided are true.
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What will be an ideal response?
The plasmid- or transposon-encoded ________ gene functions as BOTH an activator and a repressor of mercury resistance genes
a. hgp b. MerA c. MerP d. MerR