What are the three classes of segmented worms?

Why were hookworms a common parasite in the American South in the late 1800s and early 1900s?

What are nematocysts in Cnidaria?

True or false: nematodes are more numerous than insects.

How do pearls form in bivalves?

What part of the human body would be referred to by the ventral area?

What is the large opening through which water exits a sponge known as?

Which answer choice below correctly defines a plesiomorphic character?

Charles Darwin observed differences in finch beaks on different environments in the Galapagos islands. If a drought came to an island, assuming a variety of finches were all living on that island, and the shrubbery significantly decreased to favor only plants with small seeds, which finches would be best adapted to this environment?

Detritivores eat dead organic materials.