Invertebrate: an animal without a backbone
Heterotrophs: organisms that eat other plants or animals for energy and nutrients
Herbivores: organisms that feed on plants
Detritivores: organisms that feed on dead and decomposing organic matter
Carnivores: organisms that eat meat, or the flesh of animals
Omnivores: organisms that consume plants, animals, algae, and/or fungi
Radula: a structure that mollusks use for feeding that is similar to a tongue and covered with microscopic teeth
Calcium: the fifth most abundant metal in the Earth’s crust. Calcium is essential to all living things, particularly for the growth of healthy teeth and bones.
Terrestrial: living on the land
Aquatic: living in or near water
Hydrochloric acid: a strongly corrosive acid
Enzyme: a biological catalyst that speeds up the rate of a chemical reaction
Cannibal: an organism that eats another member of the same species
Sustenance: nourishment supporting life, such as food and water
Calcium carbonate: a non-toxic and odorless compound commonly found as a white mineral which occurs naturally in chalk, limestone, and marble