Bivalvia test

Question 1

what does Bivalvia mean?

Answer 1

two-valve

Question 2

Does it have eyes?

Answer 2

Bivalvia have no cephalic eyes but have eyes on the mantle margin

Question 3

What about the head and radula?

Answer 3

Bivalvia have reduced head with no radula

Question 4

What organisms are in the class Bivalvia?

Answer 4

clams, mussels, oysters, scallops, and shipworms

Question 5

How is the reproduction in Bivalvia?

Answer 5

Mostly dioecious, typically with trochophore and veliger larva. (external fertilization where gametes released into water, veliger larva settle on substrate and develop into adult)

Question 6

What are the gills like?

Answer 6

Bivalvia have platelike gills

Question 7

What does the hinge ligament do?

Answer 7

holds shell together

Question 8

What does the pallial line do?

Answer 8

represents siphons

Question 9

What does the pallial sinus do?

Answer 9

Where siphons are attached

Question 10

How do bivalves eat?

Answer 10

(filter feed) Gills trap food particles, cilia moves them to food grooves which moves them to the labial palps that sorts filtered food particles and then the food goes to mouth.

Question 11

What is the function crystalline crystal?

Answer 11

projects into the stomach and the cilia rotates the style against a chitinized gastric shield which dislodges enzyme

Question 12

What does the adductor muscle do?

Answer 12

Close the shell

Question 13

What is the correct sequence of structures encountered by food entering the mantle cavity of a bivalve?

Answer 13

Incurrent opening, gill filaments, food grove, lapial palps, mouth