Clams - Bivalvia

Question 1

MR: Name 5 types of species that fall into the category of Bivalvia

Answer 1

1. Clams
2. Oysters
3. Mussels
4. Cockles
5. Scallops

Question 2

MR: Because the class Bivalvia consists of filter feeders, this implies that their habitats are restricted to where?

Answer 2

Aquatic habitats

Question 3

FITB: Bivalvia are most diverse in ________ systems, but there are also many ________ species

Answer 3

1. Marine
2. Freshwater

Question 4

Do clams move faster or slower?

Answer 4

Slower

Question 5

Name 2 invasive bivalves in our region

Answer 5

1. Zebra mussel
2. Asian clam

Question 6

FITB: Bivalvia have 2 ________ connected by a _____ __________ dorsally

Answer 6

1. Valves
2. Hinge ligament

Question 7

FITB: Valves grow outward in “rings” from the _______

Answer 7

Umbo

Question 8

What is the oldest part of the shell called?

Answer 8

Umbo

Question 9

TOT: The foot is located at the anterior/ventral end

Answer 9

Anterior end

Question 10

What is the function of the siphon valves?

Answer 10

To bring water and suspended food into the mantle cavity

Question 11

FITB: The foot extends anteriorly from the shell to ____ the animal forward

Answer 11

Pull

Question 12

What kind of muscles pull the valves together?

Answer 12

Adductor muscles

Question 13

T/F: Gas exchange does not occur within Bivalvia

Answer 13

False; it does!

Question 14

FITB: Ctenidia is the primary _________ structure

Answer 14

Feeding

Question 15

Where does gas exchange occur within Bivalvia? (2)

Answer 15

1. Mantle surface
2. Ctenidia

Question 16

FITB: Ctenidia is a ________, folded structure with _______ tubes and _______________ chambers

Answer 16

1. Complex
2. Water
3. Suprabranchial

Question 17

FITB: Ctenidia is also used for ______ feeding

Answer 17

Filter

Question 18

The “lips” of Bivalvia are more commonly referred to as what?

Answer 18

Labial palps

Question 19

FITB: Mucus from labial palms and _________ trap food particles

Answer 19

Ctenidia

Question 20

FITB: Cilia moves mucus down ________ to _____ ________

Answer 20

1. Ctenidia
2. Food groove

Question 21

After reaching the food groove, where does mucus travel to? (Place the 6 places in order)

Answer 21

1. Mouth
2. Stomach
3. Intestine
4. Anus
5. Suprabranchial chamber
6. Excurrent siphon

Question 22

MR: Inside the stomach, what kind of style (long skinny thing) is there?

Answer 22

Crystalline

Question 23

What spins the style?

Answer 23

Cilia

Question 24

Bivalvia have a _____ cord

Answer 24

Mucus

Question 25

The style dissolves in which part of the body?

Answer 25

The stomach

Question 26

What gets released after the style dissolves in the stomach?

Answer 26

Digestive enzymes

Question 27

Cilia is responsible for sorting what?

Answer 27

Food particles (based on size)

Question 28

Where do small food particles end up going?

Answer 28

Gastric caeca

Question 29

T/F: Small food particles get sent to the gastric caeca which processes the food immediately

Answer 29

True