Coelomate - Nemertea and Molusca

Question 1

What phyla are considered Coelomates?

Answer 1

Nemertea, mollusca, Annelida, Onychophora, Arthropoda, Brachiopoda, Echinodermata, Hemichordata, Chordata,

Question 2

What are common traits of coelomates?

Answer 2

Tube in tube, bilateral symmetry, 3 germ layers, all but nemertea and mollusca are segmented.

Question 3

Which coelomates are protostomes?

Answer 3

?

Question 4

Common name of Phylum Nemertea

Answer 4

Probiscus/ribbon worm

Question 5

Phylum nemertea has what kind of symmetry?

Answer 5

Bilateral

Question 6

Does nemertea have organs or muscles?

Answer 6

yes, both

Question 7

How does phylum nemertea differ from flatworms?

Answer 7

1. One way digestive tract.

2. Simple circulatory system.

Question 8

Is Phylum Nemertea segmented?

Answer 8

no

Question 9

Shared characteristics of phylum molluska

Answer 9

Mantle, Calcium carbonate shell, visceral mass, radula, Muscular foot

Question 10

What is a mantle

Answer 10

fold of tissue draping over the visceral mass

Question 11

what is the calcium carbonate shell?

Is it found in all molluscs?

Answer 11

Outer protective shell. Present in some, may be reduced or absent in others

Question 12

what is the visceral mass

Answer 12

contains most of the internal organs

Question 13

what is the radula

Answer 13

conveyer belt of teeth used to scrape up food. Can be modified sometimes

Question 14

Muscular foot

Answer 14

bria says it is self explainatory

Question 15

What is the largest animal phyla? second largest?

Answer 15

Arthropoda, the second largest is mollusca

Question 16

Describe reproductive tendencies of phylum Mollusca

Answer 16

Most have separate sexes, some are hermaphrodites

Question 17

Are organs present in phylum mollusca?

Answer 17

yes, all major organ systems

Question 18

What are the classes of mollusca?

Answer 18

Class Polyplacophora, Class Gastropoda, Class Bivalvia, Class Scaphopoda, Class Cephalopoda,

Question 19

Common name of Class Polyplacophora

Answer 19

“Chitons”

Question 20

Are Chiton’s segmented?

Answer 20

No, their shells are.

Question 21

Where are chitons found?

Answer 21

Intertidal zone

Question 22

How do chitons eat?

Answer 22

scrape algae off of substrates

Question 23

What is included in class Gastropoda?

Answer 23

Includes snails, whelks, slugs, and nudibranchs (sea slugs)

Question 24

What is unique about the mantle in Class Gastropoda

Answer 24

Mantle is highly vascularized for respiration in terrestrial gastropods

Question 25

What is torsion and what class underdoes it?

Answer 25

Organisms twist 180 degrees and anus ends up above the mouth. Class Gastropoda

Question 26

Class Bivalvia include _______

Answer 26

Clams, oyesters, scallops, and mussels

Question 27

What class of Mollusca has no radula?

Answer 27

Bivalvia

Question 28

What class of mollusca has a Calcium Carbonate shell divided into 2 halves

Answer 28

Bivalvia

Question 29

What is the common name of the class Scaphopoda?

Answer 29

“Tooth shells”

Question 30

What is thedistinguishing characteristic of Scaphopoda,

Answer 30

Looks like a canine tooth

Question 31

Class Cephalopoda includes ____________

Answer 31

Squids, octopi, Chambered Nautilus, Cuttle fish

Question 32

In cephalopoda, the muscular foot is modified to ______

Answer 32

a siphon, part of tentacles and head

Question 33

What kind of circulatory system is found in class cephalopoda?

Answer 33

Closed circulatory system.

Question 34

What class of mollusca exhibits the ability to learn and tends to have complex patterns of behavior?

Answer 34

Cephalopoda

Question 35

Describe the distinguishing characteristics squid

Answer 35

Triangular head, shell reduced, 10 appendages,

Question 36

Describe the distinguishing characteristics Octopi

Answer 36

shell is absent, 8 appendages, round head

Question 37

shelled nautilus

Answer 37

prominent Shell coiled, 100’s of tenticles