Answer:
B) Nitrogen-fixing bacteria and lightning
Explanation:
Nitrogen cycle is the natural process in which atmospheric nitrogen is converted into nitrite and nitrate with the help of bacteria.
Nitrogen cycle is directly dependent on nitrogen-fixing bacteria and lightning.
As bacteria are responsible for most of the chemical conversion in the nitrogen cycle such as nitrogen fixation (first step) is done by soil bacteria (Cyanobacteria) that form ammonia, which is toxic to plants; nitrification in which ammonia is converted into nitrites and nitrates with the help of Nitrobacter and denitrification bacteria involve Pseudomonas, and Achromobacter which convert nitrite and nitrate into nitrogen.
The lightning breaks nitrogen molecules and allow it to combine with oxygen in atmosphere which further dissolve in rain and form nitrates.
Hence, the nitrogen cycle is most directly dependent upon nitrogen-fixing bacteria and lightning and the correct option is B.
Parietal cells produce gastric acid (hydrochloric acid) in response to histamine (via H2 receptors), acetylcholine (M3 receptors) and gastrin (gastrin receptors). Parietal cells contain an extensive secretory network (called canaliculi) from which the HCl is secreted by active transport into the stomach.
In this question we will do a Biological Classification History Check.
<h3>1. Binomial nomenclature</h3>
Binomial nomenclature or binary nomenclature designates the set of rules that regulate the attribution of scientific names to species of living beings.
<h3>2. Domain</h3>
Is based on molecular phylogeny data. According to Woese, there are three domains: Archaea Domain, Bacteria Domain, and Eukarya Domain.
<h3>3. Both focus on illustrating taxonomic relationships between organisms.</h3>
No, binomial nomenclature is for the purpose of assigning names.
<h3>4. domain, kingdom, phylum only.</h3>
No, the classification is more extensive
<h3>5. juglans nigra</h3>
It is a tree that can reach heights between 20 to 50 m. It is still a monoecious, deciduous and aromatic tree.
Learn more about Binomial nomenclature in brainly.com/question/9837065
