utc bio 2 mindtap chapter 31 test

Arthropods with mandibles, a single pair of antennae, and two legs on most body segments are:

millipedes

Refer to the accompanying figure. What is the structure labeled as 8 in the figure?

mouth

Refer to the accompanying figure. The structures labeled as 1 are used for:

attachment.

As adults, ____ are the only sessile crustaceans whose external anatomy is completely different than its fellow crustaceans.

barnacles

An elongate uniramid with many legs as well as poison claws is known as a(n):

centipede

Hermaphroditic earthworms reproduce sexually by connecting their bodies by their ____. This allows transfer of ____ from one worm to the other.

clitellum; sperm

A nauplius larva is characteristic of:

crustaceans

Which arthropods have mandibles, gills, excretory glands, and statocysts?

crustaceans

Sea anemones, unlike scyphozoans, have a partitioned gastrovascular cavity. This serves as a means of:

digesting very large food items.

Refer to the accompanying figure. What is the structure labeled as 9?

feeding polyp

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

hydrozoans

In scyphozoans, the ____ is the dominant body form.

medusa

Refer to the accompanying figure. Which label denotes the nerve cord?

5

Which of the insects in the accompanying figure is a flea?

5

Which of the following statements about arthropods is FALSE?

A. Arthropods have an exoskeleton. B. Arthropods display segmentation. C. Arthropods have an open circulatory system. D. Arthropods have an incomplete digestive tract. E. Arthropods have a true coelom (D)

The first animals to show cephalization have several characteristics. Which of the following is NOT one of them?

A. These animals were in phylum Platyhelminthes. B. These animals were triploblastic. C. These animals are placed in the group Lophotrochozoa. D. These animals had a proboscis. E. These animals followed the protostome pattern of embryonic development. (D)

Members of the phylum ____ are the simplest organisms with a separate mouth and anus.

Ctenophora

What is a disadvantage to having an exoskeleton?

Exoskeletons do not prevent desiccation.

____ is an anticoagulant used by leeches.

Hirudin

The structure shown in the accompanying figure is from an animal in phylum

Platyhelminthes.

Which is a characteristic of tapeworms?

Tapeworms have bodies that consist of hundreds of reproductive segments.

Complete ____ reduces competition among insects within the same species; larval forms do not compete with adults for food or habitats.

metamorphosis

Ribbon worms have a unique ____ that is used to capture prey.

proboscis

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

rapidly changing colors

Refer to the accompanying figure. What label designates the auricles on this organism?

2

An animal found in the rocky intertidal zone has eight overlapping plates and is tightly adhering to the rock with a muscular foot. This animal is most likely a member of the class:

Polyplacophora.

How do leeches differ from other annelids?

They do not have setae or parapodia.

Which is a characteristic of all annelids?

They have a segmented body.

The larvae of some cnidarians are known as ____ larvae.

planula

One characteristic of class Bivalvia is that they:

possess two shells with a hinge.