Question

Which two sentences or phrases correctly explain how nitrogen gets cycled through the environment? a.in nature, nitrogen generally occurs as an inorganic mineral in earth's crust. b.the mineral is first converted to the gaseous form. c.fixation can happen only biologically. d.atmospheric gases are fixed, or changed, for them to be used in the biosphere. e.assimilation helps nutrients go from the lithosphere into the biosphere.

Answer 1

Nitrogen is cycled through the environment through processes such as nitrogen fixation and assimilation.

Step-by-step explanation:

In the nitrogen cycle, nitrogen is cycled through the environment in various processes. First, nitrogen mostly occurs as an inorganic mineral in the Earth's crust (sentence a). Through a process called nitrogen fixation, atmospheric gases are converted into a usable form by either biological or non-biological means (sentence d). This fixed nitrogen can then be assimilated by plants and other organisms from the lithosphere into the biosphere (sentence e).

Answer 2

The nitrogen cycle involves processes like nitrogen fixation and nitrification that convert nitrogen into a usable form for plants and other organisms.

Step-by-step explanation:

The nitrogen cycle involves the cycling of nitrogen between the atmosphere and living organisms. One important process in this cycle is nitrogen fixation, which converts nitrogen gas in the atmosphere into a form that plants can use. This process is carried out by nitrogen-fixing bacteria in the soil and the roots of legumes. Another important process is nitrification, in which bacteria convert ammonium to nitrites and then to nitrates, which can be absorbed by plants. These processes help ensure that nitrogen is available in a usable form for organisms in the biosphere.