Squid and clams

Question 1

What is the name of squid?

Answer 1

Cephalopoda

Question 2

Autopomorphies of cephalopod?

Answer 2

1. Closed circulatory system
2. ink sac
3. beak like jaw
4. Cartilaginous brain case

Question 3

What muscles are used to pump water?

Answer 3

Mantle muscles

Question 4

How many hearts do these guys have?

Answer 4

3

Question 5

What are the names of the hearts that sit at top of gills?

Answer 5

Branchial

Question 6

Describe squid digestion

Answer 6

Food is brought in into stomach, digestive enzymes sent from digestive gland, the slew is then sent to cecum for absorption

Question 7

Where does the ink excrete from?

Answer 7

The anus

Question 8

What is the name of the arm that deposits the seminal package

Answer 8

Hectocotylous arm

Question 9

Where does the hectocotylous arm go?

Answer 9

reaches up under mantle of female and places it by the vaginal opening

Question 10

Define Chromatophores

Answer 10

Able to selectively absorb different light, which allows many members to use active camoflage

Question 11

How is the eye on squid different from humans

Answer 11

optic nerves travel along the back of the retina

Question 12

What autopomorphy of the mollusca has the clam dropped?

Answer 12

The radulla

Question 13

What is the labial palp of the clam?

Answer 13

Used to secrete mucous to ensnare particulate food

Question 14

Where is the heart of the clam?

Answer 14

Wrapped in the pericardial cavity

Question 15

What is the hemocoel filled with in clams?

Answer 15

Spongy tissue

Question 16

What is the advantage of hollow core in nephridia?

Answer 16

You are able to pump water across the top and out through the hollow core