Phylum Mollusca and Annelida

Question 1

What body cavity do Mollusca and Annelida have?

Answer 1

Coelomate

Question 2

What phylums are protosomes?

Answer 2

Mollusca
Annelida
Arthropoda

Question 3

What phylums are deuterostomes?

Answer 3

Echinodermata

Chordata

Question 4

Mollusks (snails, clams, octopuses, and squids) are soft-bodied animals w/ a specialized layer of epidermal cells called a _____ that secretes a _____.

Answer 4

Mantle, Shell

Question 5

Mollusca have 4 parts of their body plan, what are they?

Answer 5

• Head-foot - used for locotion
• Visceral Mass - digestion, excretion, repoduction, sensory structures
• Shell - made of calcium carbonate
• Mantle - aid in respiration and locomotion

Question 6

All mollusks except cephalopods have a ___ circulatory system.

Answer 6

Open

Question 7

What are the 4 classes of Mollusca?

Answer 7

Polyplacophora
Gastropoda
Bivalvia
Cephlapoda

Question 8

What is the genus of polyplacophora?

Answer 8

Chiton

Question 9

A horny-toothed organ in the mouth, scrapes food

Answer 9

Radula

Question 10

What 2 gastropods do not produce a shell?

Answer 10

Common garden slug, nudibranch

Question 11

What is nudibranch defense mechanism?

Answer 11

They eat sea jellies, hydrozoans, and corals which all have stinging structures called nematocysts. The stingers are stored on the dorsal surface of the nudibranch.

Question 12

Clams, oysters, scallops, and mussels are ______.

Answer 12

Bivalves (two shells)

Question 13

The space between the mantle and the visceral mass is the _____ _____.

Answer 13

Mantle Cavity

Question 14

The circulatory system of annelids is _____.

Answer 14

Closed

Question 15

Annelids also have _____, small, bristle-like appendages often occurring in pairs on lateral and ventral surfaces.

Answer 15

Setae

Question 16

What are the classes of phylum Annelida?

Answer 16

Polychaeta
Oligochaeta
Hirudinea

Question 17

What is the genus of class polychaeta?

Answer 17

Nereis (clam worm)

Question 18

Nereis is distinctly segmented and each segment bears a pair of fleshy appendages called _____.

Answer 18

Parapodia

Question 19

What are 2 functions of setae in Polychaeta?

Answer 19

1 - Setae filled w/ poison and used for defense

2 - Help filter food from water

Question 20

What is the genus of class Oligochaeta?

Answer 20

Lumbricus Terrestris (earthworm)

Question 21

What kind of skeleton do Oligochaetes have?

Answer 21

Hydrostatic (water-pressure) support system

Question 22

Oligochaetes lack parapodia and have ___ setae.

Answer 22

Few

Question 23

What part of a earthworm is used for reproduction?

Answer 23

Clitellum

Question 24

Are earthworms monoecious dioecious?

Answer 24

Monoecious / hermaphroditic

Question 25

Function of pharynx in earthworm

Answer 25

For suction and ingestion of food

Question 26

Function of esophagus in earthworm

Answer 26

For transport of food

Question 27

Function of crop in earthworm

Answer 27

For food storage and some digestion

Question 28

Function of gizzard in earthworm

Answer 28

For crushing of food

Question 29

Function of intestine in earthworm

Answer 29

Absorption of nutrients

Question 30

Paired nephridia in earthworms function like kidneys and...

Answer 30

Collect and release excretory wastes

Question 31

The waste in earthworms is released through external pores called _____.

Answer 31

Nephridiopores

Question 32

How many aortic arches (hearts) do earthworms have?

Answer 32

5

Question 33

Hirudineans include leeches which are ____parasites.

Answer 33

Exit

Question 34

Leeches ____ setae.

Answer 34

Lack

Question 35

Are leeches monoecious or dioecious?

Answer 35

Monoecious / hermaphroditic

Question 36

How do leeches reproduce?

Answer 36

Sexually