Both Staphylococcus aureus and Streptococcus pyogenes
A. are rod-shaped.
B. have fibronectin binding proteins.
C. cause necrotizing fasciitis.
D. have exotoxin A.
B
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Both deletions and insertions occur during the evolution of microbial genomes. Insertions bring in new genes that may be useful for the cell, but deletions
A) may increase fitness of a microorganism by eliminating unneeded genes. B) always result in a severe loss of fitness for the microorganism. C) are uncommon because they are usually lethal. D) always result in a severe loss of fitness but keep microbial genomes compact.
Assimilation efficiency is the ratio of ____
a. energy content of food consumed to the energy content of food available b. energy absorbed from consumed food to the food’s total energy content c. energy content of new tissue produced to the energy assimilated from food d. net productivity at one trophic level to the trophic level below e. producers to consumers
A mutation that changes the amino acid sequence of the resulting protein by substitution is called a ________ mutation.
A. missense B. silent C. nonsense D. None of the choices are correct.
The ________ have shells composed of calcium carbonate and thin pseudopods
A) Amebozoa B) Euglenids C) Ciliates D) Dinoflagellates E) Foraminifera