Fermentation is the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and the giving off of heat. The sugar in grapes ferments to become alcohol like in the wine bottle from my kitchen.
An exoskeleton is a rigid external covering for the body in some invertebrate animals. Crustaceans, like the one that once lived in this conch shell found in my house, have exoskeletons.
Eukaryotes are organisms that consist of a cell or cells in which the genetic material is in the form of chromosomes contained within a distinct nucleus. Yeast cells, like the ones found in my refrigerator, are eukaryotes.
Eubacteria are a type of bacterium that typically have simple cells with rigid cell walls and often flagella for movement. Some eubacteria can cause diseases and are supposedly killed by this hand sanitizer found at my house.
Ethylene is a flammable hydrocarbon gas, C2H4, of the alkene series. It occurs in natural gas, coal gas, crude oil, and is given off be ripening fruit such as the ones from my kitchen pictured.
Epithelial tissue is the membraneous tissue covering internal organs and other internal surfaces of the body. This is a picture of my leg which is covered in such tissue.
