Which group includes all of the other groups?
a. domain
b. order
c. family
d. genus
e. species
ANSWER: a
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The unknown bacterium that you are testing makes the enzyme phenyalanine deaminase, as indicated by the results of a phenylalanine test. This enzyme facilitates the removal of a/an ______ group from the organic compound so it can be converted into an intermediate compound for the Krebs cycle.
A. phosphate B. carboxyl C. amino D. hydroxyl
What percent of the known animals on Earth are invertebrates?
a. 15% b. 56% c. 89% d. 33% e. 97%
Which of the following is NOT part of the body's first line of defense against microbial attack?
A) Stomach acid B) Phagocytes C) Skin D) Lysozyme E) Mucus
Which of the folllowing describes Proteobacteria in domain Bacteria?
A. phylum B. class C. species D. genus