Week 8 - Quiz 6

The ____ of an earthworm allows them to resist desiccation in terrestrial environments.

cuticle

Which of the following animals helps to maintain fertile soil?

earthworms

Which of the following is an adaptation that enables cephalopods to escape from their predators?

rapidly changing colors

After embryonic development, members of the phylum Rotifera are incapable of:

cell division

In cnidarians, nematocysts are housed within why type of specialized cell?

cnidocytes

The anterior end of a tapeworm is known as the:

scolex

What is the purpose of protonephridia in flatworms?

to regulate fluid balance

Which is a characteristic of tapeworms? tapeworms have a closed circulatory system tapeworms have a complete digestive system tapeworms have bodies that consist of hundreds of reproductive segments tapeworms have a well developed sensory system tapeworms have a simple lifecycle

Tapeworms have bodies that consist of hundreds of reproductive segments.

Which of the following is characteristic of flatworms? They do not have statocysts (organs of balance). They have organs for food and gas exchange. They do not have eyespots. They are acoelomate (have no body cavity). They commonly have a complex nervous system.

They are acoelomate (have no body cavity).

Which is a characteristic of all annelids? They have a segmented body. They move with a muscular foot. They surround their body with a mantle. They have a visceral mass. They have an open circulatory system.

They have a segmented body.

The Portuguese man-of-war is a colony of hundreds to thousands of:

hydrozoans

Where does digestion in a sponge takes place?

individual cells

The body wall of cnidarians and ctenophores consist of:

inner and outer cell layers separated by a jelly-like mesoglea

The nervous system of many species of flatworms

is a "ladder-type"

Which of the following species has been used for centuries to draw blood from areas swollen by poisonous stings and bites?

leeches

Segmentation is important in annelids as an aid in:

locomotion

The veliger larval form is unique to:

molluscs

Which of the following terms is associated with polychaetes?

parapodia

One characteristic of class Bivalvia is that they:

possess two shells with a hinge

The intermediate host for a blood fluke is a:

snail