The above organism is responsible for fish
kills and belongs to which of the following
groups?
a. chrysophytes
b. dinoflagellates
c. flagellated protozoans
d. ciliates
e. oomycotes
B
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A urine culture was set up using a 0.001-mL calibrated loop. It yielded 100 colonies. Which of the following results would be reported to the physician?
A) 100 CFU/mL B) 1,000 CFU/mL C) 10,000 CFU/mL D) 100,000 CFU/mL
Which of the following statements is true?
a. Enzymes bond to macromolecules during condensation and detach during hydrolysis. b. Enzymes may act on any macromolecule within the same class as its primary reactant. c. Each type of enzyme serves as a catalyst for only one specific macromolecule. d. Enzymes only act during dehydration synthesis, never during hydrolysis.
Which stage of development results in an early embryo with two or three germ layers?
a. fertilization b. organ formation c. cleavage d. gastrulation
Which hypothesis explains why most examples of sexual dimorphism result in males with more elaborate decorations than females?
a. Females cannot exhibit elaborate decorations because they must protect their eggs. b. Males are always physically larger and stronger than the females of the same species. c. Males experience greater variance in reproductive success than females in those species. d. Decorations displayed by males originate in genes absent from X chromosomes.