Zoology 1st Semester

Front

What class of mollusks has either a one-piece shell or no shell, and can be marine, freshwater, or terrestrial?

Back

Class Gastropoda

Front

What is the gelatinous matrix lining the spongocoel of a sponge called?

Back

Mesohyl

Front

What term describes the two basic body forms typical of many cnidarians?

Back

Dimorphic

Front

What is the term for the formation of a head end of an animal with a concentration of nervous tissue and sense organs in the head region?

Back

Cephalization

Front

What term refers to the typically front or belly side of an animal, which is thinner skinned, lighter in color, and less hairy?

Back

Ventral

Front

What is the term for the body symmetry where the body can be divided into similar halves along multiple planes?

Back

Radial symmetry

Front

What is the term for the body symmetry where the body can be divided into two equal halves along one plane?

Back

Bilateral symmetry

Front

What is the name of the structure that allows sponges to filter water and obtain food?

Back

Choanocytes

Front

What is the term for the hard outer covering of some mollusks, often made of calcium carbonate?

Back

Shell

Front

What is the term for the opening through which water exits a sponge?

Back

Osculum