Historically,N₂ Only Entered the Atmosphere as a Result of Nitrogen

question 38

Multiple Choice

Historically,N₂ only entered the atmosphere as a result of nitrogen fixation by bacteria and archaea.How has human technology affected nitrogen cycling?

• A) Humans genetically modified plants to allow them to fix nitrogen.
• B) Humans developed a method for artificially fixing nitrogen to generate fertilizers.
• C) Humans use nitrogen as a source of renewable energy.
• D) Human technology has had no effect on nitrogen cycling.

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Definitions:

Secondary Sex Characteristics

Characteristics that emerge during puberty but are not directly involved in reproduction, such as breast development in females and facial hair growth in males.

Sexual Orientation

An inherent or immutable enduring emotional, romantic or sexual attraction to other people.

Gender Typing

The process by which a child becomes aware of their gender and thus behaves accordingly by adopting values and attributes of members of the sex that they identify with.

Sexual Orientation

Sexual orientation is an enduring pattern of emotional, romantic, or sexual attractions to men, women, or both sexes.