Exam 32: Protostome Animals

The large and remarkable pogonophoran annelids live near deep-ocean hydrothermal (volcanic) vents where food items are scarce. Many species are able to obtain enough nutrition because

Refer to the diagrams below of an earthworm. Identify the labeled structures in the cross section of the earthworm.

The most diverse (specious) group of insects consists of the

Nematodes are abundant and diverse because

Which of the following does not possess lophophores?

Butterflies belong to which order of winged insects?

Which of the following organisms are hermaphroditic?

Which of the following traits is not found in lophotrochozoans?

Which of the following statements about rotifers is true?

A lophotrochozoan with eight overlapping calcareous plates and a feeding structure called a radula belongs to which group?

_______ insects, a subgroup of the _______ insects, undergo _______ metamorphosis.

Which of the following statements about ectoprocts (bryozoans) is false?

The immature stages of insects between molts are called _______.

Based on their body _______, flatworms, rotifers, and ribbon worms were not thought to be closely related. However, _______ showed that they are a _______ group.

Refer to the diagrams below of a generalized mollusk and a bivalve mollusk. Match the labeled structures in the generalized mollusk (A-K) with the same structures in the bivalve mollusk (1-11), and give the correct names of all structures.

Scientists have not found a fossilized body of the species that is the common ancestor of all bilaterally symmetrical animals. What is the likelihood that they will do so? How have scientists been able to learn about this common ancestor?

Which of the following groups does not have a circulatory system?

Growth in ecdysozoans is accomplished by _______, a periodic shedding of the exoskeleton followed by the rapid hardening of a new and larger exoskeleton that has formed under the old one.

A thick cuticle provides an animal with protection, but it also can seal it off from the world, obstructing the exchange of gases. How would you design a simple, hypothetical animal with a covering that both provided protection and allowed gas exchange?

Which of the following is not part of the molluscan body plan?