Earth's second atmosphere (atmosphere ii) was produced primarily by which process?

Defend or refute the argument that the government has too large a presence in the agriculture industry.

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.