Unit #5 Quiz #6

Grade:«grade»

Subject:Aquatic Science

Date:«date»

1 All of the following are true when considering bivalves EXCEPT:

A Bivalves lack cephalization

B Adductor muscles are responsible for keeping bivalves tightly shut

C Bivalves use a modified radula to gather food quickly during the few instances that the shell is open

D Each individual bivalve is definitively male or female & must undergo sexual reproduction

2 Echinoderms can reproduce in all of the following ways EXCEPT:

A Hermaphroditic reproduction

B Asexual reproduction

C Sexual reproduction

D Regeneration

3 Cephalopod translates to:

A joint foot

B stomach foot

C two shell

D head foot

4 An herbivorous mollusk would most likely use ________ while feeding.

A a beak

B a poisonous harpoon (modified radula)

C a radula

D heavily ciliated gills

5 A bivalve uses ________ to consume/capture food.

A a beak

B a poisonous harpoon (modified radula)

C a radula

D heavily ciliated gills

6 The operculum plays an important role for gastropods in that:

A The operculum is responsible for the majority of gas exchange within gastropods

B The operculum seals the shell of a gastropod shut when it retreats into its shell

C The operculum helps guide the formation of the columella, but if it is damaged the shell will begin to make smaller and smaller whorls

D The operculum helps raise the eyes above the shell so that the gastropod can see almost 360 degrees

7 Crustaceans can be found in which of the following phyla:

A mollusk

B echinoderm

C arthropod

D cnidarian

8 Which of the following is a cephalopod that has an external shell:

A Snail

B Nautilus

C Squid

D Octopus

9 All of the following are potential defense mechanisms for a cephalopod EXCEPT:

A an ink sac that releases melanin

B chromatophores that allow an organism to change color & even texture

C a modified radula that is covered in neurotoxins

D modified tentacles that are lined with suction cups/hooks used to grasp prey

10 Which of the following is considered the most intelligent of known invertebrates:

A cephalopods such as squid and octopus

B cetaceans such as dolphins and whales

C crustaceans such as crabs and lobsters

D bivalves such as clams and oysters

11 The following organism has which type of symmetry:

A radial

B asymmetry

C bilateral

D hexamerism

12 In the following picture, which represents the anterior protion of the organism:

A

B

C

D

13 Which of the following represents the body whorl:

A

B

C D

14 Which of the following represents the aperture:

A

B

C D

15 The following image represents which type of symmetry:

A radial

B asymmetry

C bilateral

D hexamerism