Mod 13

Question 1

____ = soft

Answer 1

molluscus

Question 2

A structure unique to Mollusca, tongue-like organ which consists of rows of tiny teeth found within the mouth

Answer 2

Radula

Question 3

Phylum Mollusca (shape)

Answer 3

Bilaterally symmetrical

Question 4

A ventral, sole-like structure for locomotion and capturing food

Answer 4

Foot

Question 5

___ means organs

Answer 5

Visceral

Question 6

Sheath of skin that hangs down on each side of the body to protect the soft parts of the visceral mass

Answer 6

Mantle

Question 7

The space between the mantle secretes the shell

Answer 7

Mantle cavity

Question 8

Houses the respiratory organs

Answer 8

Mantle cavity

Question 9

Secreted and lined by the mantle

Answer 9

Shell

Question 10

3 layers of the shell

Answer 10

1. Periostracum
2. Prismatic layer
3. Navreous layer

Question 11

Outer layer, composed of conchiolin

Answer 11

Peristracum

Question 12

Middle layer, composed of calcium carbonate

Answer 12

Prismatic layer

Question 13

Very thin inner layer called “nacre” that lies next to the mantle

Answer 13

Nacreous layer

Question 14

A paired comb-like or feather-like respiratory organ or gill with many filaments that line up in a row

Answer 14

Ctenidium

Question 15

Pair of kidneys

Answer 15

Metanephridia

Question 16

Main ganglia in head area

Answer 16

Cerebral

Question 17

Main ganglia near gills/ctenidia

Answer 17

Pleural

Question 18

Main ganglia that controls the foot/tentacles

Answer 18

Pedal

Question 19

Ganglia that controls the visceral organs

Answer 19

Visceral

Question 20

Ganglia around the mouth

Answer 20

Buccal

Question 21

Free-swimming larva that emerges from the egg

Answer 21

Trocophore

Question 22

The larval form that follows after trocophote stage in many molluscan groups

Answer 22

Veliger