Single-celled eukaryotes that are similar to animals in their nutritional needs and cellular structures. They are usually found in water.
Glycocalyx
Sticky external layer of polysaccarides, polypeptides or both, which surrounds some cells. There are two types - slime layer and capsule
Fimbriae
Extensions of some bacterial cells that function along with glycocalyces to adhere cells to each other and to environmental surfaces.
Hypertonic Solutions
These are solutions with a higher concentration of solutes than water. Cells in them become shriveled.
Hypotonic Solutions
These are the opposite of hypertonic solutions. They contain a higher concentration of water molecules than solutes. Cells suspended in them will expand and eventually burst.
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