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8. Which prokaryotes are responsible for adding oxygen to the atmosphere?
A. Purple photosynthetic bacteria
B. Cyanobacteria
C. Green photosynthetic bacteria
D. Archaea
9. Why is nitrogen fixation such an important process for plants?
A. Nitrogen fixation produces ammonia, which is used by plants for energy.
B. Nitrogen fixation produces nitrogen gas, which plants add to the atmosphere.
C. Plants cannot use atmospheric nitrogen to make amino acids or proteins.
D. Nitrogen gas is an important reactant in plant protein synthesis.
10. Which of the following describes the process where humans use living things like bacteria to break down pollutants?
A. Nitrogen fixation
B. Bioremediation
C. Digestion
D. Biodegradable
A. Purple photosynthetic bacteria
B. Cyanobacteria
C. Green photosynthetic bacteria
D. Archaea
9. Why is nitrogen fixation such an important process for plants?
A. Nitrogen fixation produces ammonia, which is used by plants for energy.
B. Nitrogen fixation produces nitrogen gas, which plants add to the atmosphere.
C. Plants cannot use atmospheric nitrogen to make amino acids or proteins.
D. Nitrogen gas is an important reactant in plant protein synthesis.
10. Which of the following describes the process where humans use living things like bacteria to break down pollutants?
A. Nitrogen fixation
B. Bioremediation
C. Digestion
D. Biodegradable