Answer:
Horizon A es deficiente en minerales.
Horizon B sufre la menor cantidad de cambios.
La roca madre se encuentra debajo de las capas del suelo.
Explanation:
Correct answer: D) From bacteria living in their roots
Nitrogen is an essential plant nutrients, but it is metabolically unavailable to higher plants and animals. It is available to some species of microorganism by biological nitrogen fixation in which nitrogen is converted to ammonia with the help of enzyme dinitrogenase.
The process of breaking apart the two atoms in a nitrogen molecule is called nitrogen fixation. Plant obtain the nitrogen they need from the soil which is already fixed by the bacteria and archae.
Example: <em>Azobacter</em><em>,</em> Nostac
Jeremy is developing an experiment and is concerned about the accuracy of his data.Which step can he take to best ensure accuracy?
The first step he can take to best ensure accuracy of his data is to do further research and make experiments.
