Deck 14: The Diversity of Benthic Marine Invertebrates

Question 1

What is the advantage of bilateral symmetry in animals?

A) Can sense food equally in all directions
B) Superior in every way to radial symmetry
C) Can more efficiently detect signals from one direction while moving
D) Is always useful to have a rear end

Answer 1

C

Question 2

Sponges feed by means of

A) Currents formed by amoebocyte cells
B) Currents generated by muscular contraction
C) Currents formed by collar cells
D) External water currents only

Answer 2

C

Question 3

All sponges have

A) Spicules
B) Bilateral symmetry
C) Nematocysts
D) No chemical defenses

Answer 3

A

Question 4

All sponges

A) Reproduce exclusively asexually
B) Have sexual reproduction
C) Are diffuse organisms with no morphological organization
D) Are found only in coral reefs

Question 5

All Cnidaria

A) Have a swimming life stage known as a medusa
B) Are colonial
C) Have collar cells
D) Have nematocysts

Question 6

Flatworms have

A) Many representatives that are parasitic
B) No structure capable of gathering food actively
C) A complete digestive tract with mouth and anus
D) Only free-living representatives

Question 7

Nemerteans differ from nematodes in that they

A) Are all suspension feeders
B) Have many nonmarine representatives
C) Are all carnivores
D) Live in the deep sea only

Question 8

Annelids differ from nematodes in

A) Having a complete digestion system
B) Being marine only
C) Having mouthparts
D) Having segments

Question 9

Members of the Polychaeta

A) Have parapodia
B) Lack setae
C) Are segmented, unlike the Oligochaeta
D) All of the above

Question 10

The Pogonophora

A) Are worm-like in shape
B) Lack a complete digestive tract
C) Are found in the deep sea
D) All of the above

Question 11

A close relative of the Pogonophora is

A) Flatworms
B) Nemerteans
C) Vestimentifera
D) Mollusks

Question 12

Torsion

A) Is found in mollusks that lack a radula
B) Is found in only the scaphopods
C) Is an important feature of gastropods
D) Refers to the spiral form of the shell

Question 13

Bivalve mollusks

A) Have a gill that is used only for feeding
B) Have a gill that is used often for both feeding and respiration
C) Respire by flapping the gill within the mantle cavity
D) Cannot use the gill in feeding

Question 14

The radula

A) Is found in gastropods and chitons
B) Is found in gastropods and scaphopods
C) Is not found in chitons and bivalves
D) Is used only for locomotion in cephalopods

Question 15

Which of the following is not a mollusk?

A) Polyplacophora
B) Monoplacophora
C) Gastropoda
D) Lophophorate

Question 16

Which of the following have a complete gut, including an anus?

A) Sea anemones
B) Pogonophora
C) Vestimentifera
D) Acorn barnacles

Question 17

All arthropods share

A) A calcified internal skeleton
B) A calcified external skeleton
C) An external skeleton composed of chitin
D) A strictly marine habitat

Question 18

Trilobites belong to

A) The Crustacea
B) The Mollusca
C) The Annelida
D) The Arthropoda

Question 19

Which of the following are not arthropods?

A) Pycnogonids
B) Brachiopods
C) Barnacles
D) Chelicerates

Question 20

Brachiopods, bryozoans, and phoronids share the following:

A) They are all colonial
B) A ctenidium
C) A radula
D) A lophophore

Question 21

Echinoderms differ from mollusks in their

A) Dominant radial symmetry
B) Lack of three tissue layers
C) Lack of a calcium carbonate skeleton
D) All of the above

Question 22

Some echinoderms defend themselves with

A) Tube feet
B) Pedicillariae
C) Aristotle's lantern
D) Water-vascular system

Question 23

Benthic sea squirts are most closely related to

A) The sponges
B) The vertebrates
C) The arthropods
D) Plants

Question 24

In Cambrian times

A) All of the phyla that lived failed to survive to the present
B) No bilateral groups had arisen as yet
C) Nearly all of the fossilizable living phyla had appeared by then
D) None of the above