What does the enzyme nitrogenase do?
A. It is a eukaryotic enzyme that removes amino groups from proteins that get converted into ammonia.
B. It is a prokaryotic enzyme that converts nitrogen gas to ammonia.
C. It is a bacterial enzyme that oxidizes nitrate to gaseous nitrogen.
D. It is a eukaryotic enzyme that oxidizes ammonium to form nitrate.
B. It is a prokaryotic enzyme that converts nitrogen gas to ammonia.
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During unfavorable growth conditions, many protozoa can convert to a resistant, dormant stage called a(n) ________.
A. trophozoite B. cyst C. sporozoa D. endospore E. seed
What is a major predator of giant squids?
a. Sperm whales b. Orca c. Beaked whales d. Pilot whales
Plants use ________ and ________ wavelengths of light and reflect the ________ wavelength.
A. green, blue, red B. white, green, blue C. red, blue, green D. white, green, red E. green, red, blue
If this structure were nibbled off by browsing deer, it would decrease the potential for an increase in height of the plant.
A. the terminal bud B. the leaf scar C. the axillary bud D. the stem E. the bark