Chapter 34- Coelomate Invertebrates

Question 1

What is in Phylum Mollusca

Answer 1

Snails, slugs, clams, octopuses

Question 2

What is the viceral mass

Answer 2

Located in mollusks, it is above their foot, and contains most organs

Question 3

Mantle?

Answer 3

Mollusks

• tissue surrounding mollusc body
• secretes shell if one

Question 4

Foot?

Answer 4

Mollusks

-primary means of locomotion for many

Question 5

Ctenida?

Answer 5

Gills in aquatic mollusks

-filter food in most bivalves

Question 6

Shell

Answer 6

Mollusks

• protects against predators and adverse environments
• not essential

Question 7

Radula?

Answer 7

Mollusks

-rasping tongue like structure used in feeding

Question 8

What type of circulatory system do Mollusks have?

Answer 8

Open circulatory system

-except for cephalopods

Question 9

What are Polyplacophora

Answer 9

Class of Mollusks

• Chitons
• oval bodies and overlapping dorsal plates

Question 10

What are Gastropods

Answer 10

Class Gastropoda of Mollusks
-limpets, snails, slugs
single shell
have torsion-digestive tract faces same direction(mouth and anus)

Question 11

What are nudibranches

Answer 11

class gastropoda

• active predators
• take nematocytes from cnidarians and use them on their own surface

Question 12

Bivalves?

Answer 12

Class Bivalvia-phylum Molluska
clams, scallops, mussels, oysters
no distinct head
2 shells hinged together

Question 13

Cephalopoda?

Answer 13

Class of phylum Mollusca

• active predators
• closed circulatory system
• octopuses etc.
• jet propulsion using siphon

Question 14

What does Gonochoric mean?

Answer 14

Separate sexes in species

Question 15

Phylum Nemertea?

Answer 15

long worms similar to flatworms

• have complete digestive tract
• Gonochoric with sexual reproduction

Question 16

Whats the only class of Mollusks with a closed circulatory system

Answer 16

Cephalopoda

Question 17

Phylum Annelida?

Answer 17

segmented round worms

• built of repeating units
• many have eyes
• ventral nerve cord

Question 18

What phylum has specialization because of segmentation?

Answer 18

Phylum annelida

Question 19

What is class clitellata a part of and whats in it?

Answer 19

It is in phylum annelida

-earthworms

Question 20

Phylum arthropoda

Answer 20

most successful animal

• jointed appendages (wings, legs)
• Exoskeleton of chitin and protein
• open circulatory system

Question 21

What are the 4 classes of arthropods?

Answer 21

chelicerates, crustaceans, hexapods, and myriapods

Question 22

What is segmentation?

Answer 22

occurs in arthropods

• body is either divided into head, thorax and abdomen
• or head and thorax fused

Question 23

What type of eyes do arthropods have?

Answer 23

compound eyes-composed of independent visual units

Question 24

Whats in class Chelicerata

Answer 24

SPiders, ticks, mites, scorpions, horseshoe crabs

• lack antennae
• bipartate body (2 part)

Question 25

What is class crustacea

Answer 25

Crabs, shrimps, lobsters, barnacles
bipartate body
-2 pairs antennae
-gas exchange through gills or across cuticle

Question 26

What is a decapod crustacean

Answer 26

shrimps, lobster, crabs

-have 10 feet

Question 27

What is class hexapoda

Answer 27

Insects
-more than half of all named animal species
-tripartate body plan
thorax has 3 segments
-hexapods-3 pairs of legs attached to thorax

Question 28

What is metamorphosis

Answer 28

in class hexapoda

• insects morph into an adult species
• example butterflies

Question 29

Class Myriapoda?

Answer 29

centipedes and milipedes

• poison fangs
• head regions followed by numerous segments

Question 30

What type of coleomates are Echinoderms?

Answer 30

Deuterostomes

Question 31

Describe Phylum Echinodermata

Answer 31

Exclusively marine

-sea stars, brittle stars, sea urchins

Question 32

What type of symmetry do Echinodermata have?

Answer 32

pentaradial as adult, bilateral as larva

-systems organized with branches radiating from center

Question 33

What type of skeleton do Echinoderms have?

Answer 33

endoskeleton

-epidermis covers skeleton

Question 34

What do all echinoderms have?

Answer 34

a water vascular system

-radially organized

Question 35

What is in class asteroidea of phylum echinodermata

Answer 35

sea stars and sea daisies

-important predators, 5 arms

Question 36

What is in class echinoidea in phylum echinodermata

Answer 36

sea urchins and sand dollars

• lack arms
• protective moveable spines

Question 37

what is in class ophiuroidea in phylum echinodermata

Answer 37

brittle stars

-equal diameter arms

Question 38

what is in class crinoidea of phylum echinodermata

Answer 38

sea lilies and feather stars

Question 39

what is in class holothuroidea in phylum echinodermata

Answer 39

sea cucumbers