Chapter 7

Question 1

Large hole at the top of a sponge

Answer 1

Osculum

Question 2

When one organism lives on or in another without harming it

Answer 2

Symbiosis (commensalism)

Question 3

Sponges live in what two environments

Answer 3

Marine and Fresh Water

Question 4

Animals that strain their food from the water are

Answer 4

Filter feeders

Question 5

The term for organisms that are attached to a substrate

Answer 5

Sessile

Question 6

Cnidarians get their name from what type of cell

Answer 6

Cnidoblasts; Cnidocytes (nematocysts)

Question 7

The sessile stage in the lifecycle of a jellyfish

Answer 7

Polyp

Question 8

Two causes of coral bleaching

Answer 8

Sedimentation & global warming

Question 9

The symbiotic dinoflagellate algae that lives in coral polyps and the two things the produce

Answer 9

Zooxanthellae: Food & Oxygen

Question 10

Process by which these organisms repair/replace body parts

Answer 10

Regeneration

Question 11

Organisms that obtains its food by living in or on the body of another (it’s host).

Answer 11

Parasite

Question 12

Movement in Echinoderms is accomplished by

Answer 12

Tube Feet

Question 13

To possess both male and female sex organs and be able to produce eggs and sperm

Answer 13

Hermaphrodite

Question 14

Material that arthropods exoskeleton is made of

Answer 14

Chitin

Question 15

The process of molting is related to the live function of

Answer 15

Growth

Question 16

Shrimp-like animals that baleen whales and fish thrive on

Answer 16

Krill

Question 17

Feathery appendages of a barnacle used to obtain food

Answer 17

Cirri on legs

Question 18

Two main body segments of these bilaterally symmetrical crustaceans

Answer 18

Cephalothorax & Abdomen

Question 19

The membrane that lines the inside of mollusk shells and produce calcium carbonate

Answer 19

Mantle

Question 20

Protein fibers produced by mussels for attachment to a substrate

Answer 20

Byssal threads

Question 21

The name of the toothed structure used by Gastropods to feed

Answer 21

Radula

Question 22

Pigmented cells that enable the squid and octopus to change colors

Answer 22

Chromatophores

Question 23

The mollusk without a shell that evolved toxicity as a defense

Answer 23

Nudibranch

Question 24

What group has a simple body plan made up cells that are not complex tissues

Answer 24

Sponges

Question 25

A group with radial symmetry and consists of sea anemones, jellyfish, and coral

Answer 25

Cnidaria

Question 26

What is the specific name for the form Cnidarians can take in the "sessile" life stage

Answer 26

Polyp

Question 27

What is the name for the "stinging cells" Cnidarians use to help capture prey

Answer 27

Nematocysts

Question 28

Which layer of cells form the outer body wall of Cnidarian

Answer 28

Epidermis

Question 29

Which phylum consists of animals that have a basic body plan, a mantle, and a set of radula

Answer 29

Mollusks

Question 30

Which class of mollusk is characterized by having a stomach foot

Answer 30

Gastropods

Question 31

Which Cephalopods have eight arms, two tentacles, and an internal shell

Answer 31

Cuttlefish

Question 32

Animals with segmented, bilaterally symmetrical bodies, jointed appendages, and exoskeletons

Answer 32

Arthropods

Question 33

What is the name for the gelatinous, narrow middle layer that does not contain cells

Answer 33

Mesoglea

Question 34

A type of hydrozoan that is actually a float made of a drifting colony of polyps

Answer 34

Siphonophores

Question 35

Which class of Cnidaria consists of the most dangerous animals known (box jellyfish)

Answer 35

Cubozoa

Question 36

An animal that has ciliary combs, radial symmetry, and tentacles with no stinging cells

Answer 36

Comb jellyfish

Question 37

What is the name for a long, fleshy tube used by ribbon worms to entangle prey

Answer 37

Proboscis

Question 38

Which type of worm has a symbiotic relationship with bacteria

Answer 38

Beard Worms

Question 39

What is the name for a ribbon of small teeth used by mollusk in feeding

Answer 39

Radula

Question 40

What has a set of tentacles arranged in a horse-shaped, circular, or coiled fashion

Answer 40

Lophophore

Question 41

Which animals superficially resemble true spiders and use proboscis to capture prey

Answer 41

Sea spiders

Question 42

Which phylum actually means "spiny-skinned" and consists of sea star and sea cucumbers

Answer 42

Echinodermata

Question 43

Echinoderms that have a round, rigid, she'll-like body with movable spines and eat seaweeds

Answer 43

Sea Urchins

Question 44

What is the name for the defense mechanism used by sea cucumbers

Answer 44

Evisceration

Question 45

An Echinoderm that uses its arms for moving and has tube feet that lack suckers

Answer 45

Brittle stars

Question 46

What is the name of the body cavity made from the mesodermic tissue get complex animals

Answer 46

Coelem

Question 47

What organisms filter food particles from the water by pumping water through their bodies

Answer 47

Filter feeder

Question 48

What have only three pairs of legs and tend to live at the sea's edge as scavengers

Answer 48

Insects

Question 49

What is the name for an external skeleton secreted by the underlying layer of tissue

Answer 49

Exoskeleton

Question 50

What is the common name for the chordates without backbone

Answer 50

Protochordates

Question 51

What is the ability to grow lost or damaged body parts, as seen in Echinoderms

Answer 51

Regeneration

Question 52

The name of Porifera cells that, with their flagella, create an inward current

Answer 52

Choanocytes