Which of the following would be considered a sessile filter feeder?

Which of the following is not a feature common to all mollusks?

Proglottids and a scolex are parts of a

Which of the following is the only phylum with deuterostome development?

Bread mold is included in this phylum:

A large mass of fungal hyphae is called

Amoebocytes, collar cells, and spicules are commonly associated with which of the following phyla?

A small population is likely to evolve because of          , but this is not likely to be true for large populations.

Modern taxonomists have changed from a 5 kingdom to a

The term for sedimentary rock layers is [____].