Examlex
In an ammonium ion, nitrogen has a valence of 4, and zero nonbonding electrons. What is the correct formal charge of nitrogen with 4 covalent bonds?
Unicellular Eukaryotes
Organisms that consist of a single cell and have a nucleus enclosed within membranes, unlike prokaryotic cells.
Protists
Eukaryotic organisms that are not plants, animals, or fungi and are often unicellular, such as amoebas or algae.
Bacteria
Single-celled microorganisms that can exist either as independent organisms or as parasites, with some causing diseases and others being beneficial.
Heterotrophic
Describes organisms that obtain their energy by consuming other organisms, as they cannot synthesize their own food.
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