Nitrogen-fixing bacteria convert atmospheric nitrogen (N2 gas) into ammonium (NH4) .Why is this conversion important for life on Earth?
A) Ammonium is an important cleaning agent.
B) Nitrogen gas is toxic.
C) Ammonium is a very important plant nutrient.
D) Nitrogen gas leads to global warming.
Correct Answer:
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Q1: How old is our planet Earth?
A)4.6 thousand
Q2: What do the following groups of organisms
Q3: The main hypothesis about the origin of
Q4: Which of the following statements is accurate?
A)Prokaryotes
Q5: Where do you expect to find thermophiles?
A)In
Q7: Prokaryotic organisms are present in how many
Q8: By what means do prokaryotes typically divide?
A)Binary
Q9: Where would you expect to find methanogens?
A)Near
Q10: Halophiles are a type of _.
A)Bacteria
B)Archaea
C)Eukarya
D)Animals
Q11: Which protective structure forms to protect certain
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