a. Bacteria are essential to life on Earth. → TRUE
Bacteria play a vital role in the chemical cycling of elements such as nitrogen and sulfur.
Which of the following statements regarding bacteria is/are TRUE?
a. Bacteria are essential to life on Earth.
b. Certain bacteria obtain their energy from inorganic gases.
c. Bacteria often have a symbiotic relationship with other organisms.
d. a and b
e. a, b, and c
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What scientific concept do you need to know in order to solve this problem?
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