Exam 2 Multiple Choice

Question 1

Based upon new molecular evidence that suggests the nervous system was secondarily lost in some basal animal groups, which of the following is suggested as the an alternative to the Porifera as the basal animal group?

Answer 1

B) Ctenophora

Question 2

The ____ is the feeding cell in the Porifera

Answer 2

C) choanocyte

Question 3

Which of the following exhibit diploblastic development?

Answer 3

E) B and C
(B: Cnidaria and C: Ctenophora)

A) Porifera
B) Cnidaria
C) Ctenophora
D) Platyhelminthes

Question 4

Which of the following best describes how oxygen is delivered to tissues in a hydra (Cnidarian)?

Answer 4

D) diffusion

Question 5

The octopus is an extremely intelligent mollusk. It is also a highly active predator. Which of the following is likely associated with increased metabolic rate?

Answer 5

E) all of these

• the presence of gills
• a closed circulatory system
• heart-like organs for pumping hemolymph
• a complete digestive system

Question 6

A tandem array (repeating series) of similar body parts is termed

Answer 6

A) metamerism

Question 7

This group of organisms must shed its cuticle in order to grow

Answer 7

C) nematoda

Question 8

Tapeworms have lost their

Answer 8

C) digestive system

Question 9

A tentacled, ciliated, u-shaped mouth structure is termed a

Answer 9

A) lophophore

Question 10

An epidermis, mesoglea, and gastrodermis is characteristic of

Answer 10

B) jellyfish

Question 11

Planarians lack dedicated respiratory and circulatory systems because

Answer 11

A) none of their cells are far removed from the gastrovascular cavity or from the external environment

Question 12

Excretion in both annelids and molluscs occurs through

Answer 12

C) nephridia

Question 13

This animal secretes both anticoagulants and anesthetic in order to ingest a blood meal from its host

Answer 13

C) Hirudianea

Question 14

If a gill were to be found in a mollusc, where would it be located?

Answer 14

A) mantle cavity

Question 15

A wheel organ, pedal extensions, a mastax, and extensive parthenogenesis is characteristic of which group?

Answer 15

B) Rotifera

Question 16

Bivalves capture food using their ___ and thus are considered to be suspension feeders

Answer 16

C) ctenidia

Question 17

A closed circulatory system is characteristic of

Answer 17

C) annelids

Question 18

Echinoderms are the only known organisms to possess

Answer 18

C) a water vascular system

Question 19

The ambulacraria include

Answer 19

E) A and B
(A: echinoderms and B: hemichordates)

A) echinoderms
B) hemichordates
C) cephalochordates
D) urochordates

Question 20

The following are characteristic of all chordates (at some point in their life history)

Answer 20

E) all of these

• notochord
• dorsal hollow nerve tube
• pharyngeal gill pouches
• post-anal tail

Question 21

The excretory organ uniquely found in the insects is/are

Answer 21

A) Malpighian tubules

Question 22

An endocrine system is characteristic of

Answer 22

B) arthropods

Question 23

An arthropod emerges as a miniature version of the adult form. After each molt, the arthropod increases in size, yet does not change its body morphology. This is an example of

Answer 23

E) incomplete metamorphosis

Question 24

What is believed to be the most significant result of the evolution of the amniotic egg?

Answer 24

A) tetrapods were no longer tied to the water for reproduction

Question 25

It is believed that the coelacanths and lungfish represent a crucial link between other fishes and tetrapods. What is the major feature in both these fish in support of this hypothesis?

Answer 25

B) Their fins have skeletal and muscular structures similar to amphibian limbs

Question 26

A favored hypothesis concerning the origin of vertebrate jaws postulates that ___ were repurposed and contributed to a jaw

Answer 26

D) pharyngeal gill arches

Question 27

Which of the following would not belong to the osteichthyes clade?

Answer 27

A) sharks

Question 28

Birds and mammals are highly active endotherms. Which of the following is consistent with these traits?

Answer 28

E) all of these

• four-chambered heart
• secondary palate
• ventilated lungs
• closed circulatory system

Question 29

Synapomorphies associated with mammals include

Answer 29

E) all of these

• hair
• mammary glands
• heterodont dentition
• placentae

Question 30

Hollow bones are found in the

Answer 30

C) aves