Nitrogen fixation is a process in which nitrogen (N2) in the Earth's atmosphere is converted into ammonia (NH3). Atmospheric nitrogen or molecular dinitrogen (N2) is relatively inert: it does not easily react with other chemicals to form new compounds.
Answer:
Animal waste decay by the action of bacteria which create :
- Ammonia and nitrate products i.e. rich in nitrogen.
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The cartilaginous structures<span> that ring most mammalian tracheae are ... The </span>trachea<span> is</span>lined<span> with a moist mucous-membrane layer composed of </span>cells<span> containing small hairlike projections called </span>cilia<span>. ... </span>Such<span> outgrowths could </span>have<span> been useful to insects exposed by the drying up of a temporary aquatic.
IMPORTANT! * MARK AS BRAINLIEST </span><span>ANSWER !!!! *</span>
Answer:
c. energy flows from primary producers to consumers, in one direction only
