Referring to the figure, an average bacterium is roughly the same size as which eukaryotic organelle?
a. lipid
b. protein
c. mitochondria
d. egg
c. mitochondria
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The reduction of atmospheric nitrogen to ammonia is called ________.
A. nitrification B. denitrification C. nitrogen fixation D. ammonification
Which is an example of warning coloration?
a. The dark brown mane of a lion b. The bright green and blue feathers of a peacock c. The black and yellow bands of a wasp d. The black and white stripes of a zebra e. The bright red color of roses
The urinary system helps to maintain the extracellular fluid pH by
a. synthesizing buffers. b. retaining carbon dioxide in the filtrate. c. excreting hydrogen ions as water. d. combining hydrogen ions with urea. e. joining hydrogen ions with bicarbonate.
The taxon directly below Order is:
a. family b. genus c. phylum d. species