Lesson 22 Lecture notes

Question 1

What kind of symmetry does phylum Mollusca exhibit?

Answer 1

bilateral symmetry

Question 2

What sort of bodies do Phylum Mollusca have?

Answer 2

soft bodies

Question 3

Class Bivalvia include

Answer 3

clams, oysters, mussels, etc.

Question 4

what two things align the two shells of Phylum Bivalvia?

Answer 4

Hinge teeth and ligaments

Question 5

Which bivalves contain no feet?

Answer 5

Oysters and scallops

Question 6

What kind of circulatory system do Bivalves have?

Answer 6

Open circulatory system with a heart but no blood vessels

Question 7

What kind of nervous system do Bivalves have?

Answer 7

Made up of three pairs of ganglia and nerves that extend into the rest of the body

Question 8

What kind of reproductive system do Bivalves have?

Answer 8

Sperm leaves the male excurrent syphon and enter the female incurrent syphon to the eggs on her gills

Question 9

Gastropods are referred to as —–

Answer 9

univalves

Question 10

How many pairs of tentacles do gastropods have?

Answer 10

two- one for seeing, one for feeling

Question 11

Cephalopods have a well-developed head with —–

Answer 11

many tentacles or feet, and a beak-like jaw.

Question 12

Cephalopods move by —–

Answer 12

jet propulsion

Question 13

Cephalopods have what kind of nervous system?

Answer 13

Large brain and complex eyes

Question 14

Cephalopods have what kind of Circulatory system?

Answer 14

Closed circulatory system- the only invertebrates that have this- three hearts

Question 15

Cephalopods (octopus) have what kind of reproductive system?

Answer 15

Sexual- but most octopus die after mating

Question 16

Cephalopods have what kind of defense system?

Answer 16

inking- they produce dark ink which can blind some predators