Which of the following statements about the function of flowers is TRUE?
A) They provide nutrients to the embryo.
B) They protect seeds until they are mature.
C) They attract seed dispersers.
D) They aid in the dispersal of seeds.
E) They attract pollinators.
E
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Which statement about mitochondria is true?
a. Mitochondria are surrounded by two membranes b. Mitochondria are less than 1 micrometer in length. c. Mitochondria are able to survive outside the cell. d. Mitochondria have linear DNA chromosomes.
Which of the following best describes the endosymbiotic theory?
a. Aerobic respiration is more efficient than anaerobic respiration. b. Prokaryotes evolved to live side by side with eukaryotes. c. Eukaryotes are the result of one prokaryotic cell engulfing another. d. Mitochondria can only live inside a eukaryotic cell.
Which drug results in the development of infants
without arms or legs if taken during pregnancy? a. tetracycline b. thalidomide c. streptomycin d. salicylic acid e. codeine
A Gram-negative bacillus that exhibits strong urease activity is isolated from a patient with a urinary tract infection. Which of the following is a plausible identification for this microbe?
A) E. Coli B) Proteus mirabilis C) Salmonella enterica D) Klebsiella pneumoniae