A flood irrigation is the answer
Answer:
C. lack the enzymes to reduce N2 and NO3- to NH4+
Explanation:
Nitrogen fixation is a process by which atmospheric nitrogen (N2) is converted into ammonia (NH3) so that can be used in metabolic pathways (e.g. biosynthesis of macromolecules). Nitrogen fixation is performed by Archea and bacteria such as Azotobacter (usually in symbiosis with Leguminosa plants).
Nitrogen assimilation is a process in which organic compounds are made from inorganic nitrogen.
The conclusion drawn from the fact that DNA analysis of all chloroplasts reveals that they are monophyletic is Endosymbiosis of the same species of cyanobacteria occurred multiple times in cells that evolved into red, green, and brown algae.
Most scientists agree that non-photosynthetic eukaryotic hosts originally acquired photosynthetic prokaryotic endosymbionts, which led to the formation of plastids. It is also acknowledged that non-photosynthetic eukaryote hosts frequently took on photosynthetic eukaryotes as endosymbionts in order to create secondary plastids.
It is shown that primordial plastids had a single, or "monophyletic," genesis. The red, green, and glaucophyte plastids are thought to belong to a single group, either as a subgroup of oxygenic photosynthetic prokaryotes or as a sister group, according to the monophyletic hypothesis of plastid genesis.
Therefore,Endosymbiosis of the same species of cyanobacteria occurred multiple times in cells that evolved into red, green, and brown algae.
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All organisms, plants, animals, and bacteria are all biotic factors (living things), and every living thing has to have cells. Within cells there are organelles. Some organelles are ribosomes, endoplasmic reticulum, mitochondria, nucleus, etc... Mitochondria houses ATP, and all eukaryotic cells (cells with a nucleus) have mitochondria.