Chapter 33: Ecdysozoa Slide 89

Question 1

Name the 6 of Ecydsozoa

Answer 1

Lorifcifera, Priapula, Tardigrada, Onychophora, Nematoda, and Anthropoda

Question 2

Are tiny and live in marine sediments

Answer 2

Loricifera

Question 3

A pocket formed by six plates, surrounds the abdomen

Answer 3

Lorica

Question 4

The head, neck, and thorax telescope in and out of the _______

Answer 4

Lorica

Question 5

These worms have a large, rounded proboscis at their anterior end

Answer 5

Priapula

Question 6

Most species burrow in sea floor sediments

Answer 6

Priapula

Question 7

Are major predators during the Cambrian period

Answer 7

Priapulans

Question 8

Range from 0.5 mm to 20 cm in length

Answer 8

Priapula

Question 9

Velvet worms

Answer 9

Onychophora

Question 10

Originated during the Cambrian explosion

Answer 10

Onychophora

Question 11

Have fleshy antennae and several dozen pairs of saclike legs

Answer 11

Onychophora

Question 12

Water bears

Answer 12

Tardigrada

Question 13

Have a bear like shape and gait, though most are less than 0.5 mm long

Answer 13

Tardigrada

Question 14

Live in aquatic habitats, or on plants or animals

Answer 14

Tardigrada

Question 15

In the dormant state, they can survive for days at low temperatures

Answer 15

Tardigrada

Question 16

Roundworms

Answer 16

Nematoda

Question 17

Are abundant in soil and aquatic habitats

Answer 17

Nematodes

Question 18

Many species parasitize plants and animals

Answer 18

Nematoda

Question 19

A tough cuticle coats their body

Answer 19

Nematoda

Question 20

The majority of known animal species

Answer 20

Arthropoda

Question 21

Include insets, crustaceans, and arachnids

Answer 21

Arthropods

Question 22

Have a segmented exoskeleton with jointed appendages

Answer 22

Arthropoda

Question 23

This group includes both invertebrates and vertebrate species

Answer 23

Deuterostomia

Question 24

Name the 3 of Deuterostoma

Answer 24

Hemichordata, chordata, and Echinodermata

Question 25

Share some traits with chordates, such as gill slits and dorsal nerve cord

Answer 25

Hemichordata

Question 26

Largest group of Hemichordata is the ________ worms

Answer 26

Acorn

Question 27

Marine animals that live in mud or under rocks

Answer 27

Acorn worms (Hemichordata)

Question 28

They can grow more than 2 m in length

Answer 28

Acorn worms (Hemichordata)

Question 29

More than 90% of all are vertebrates

Answer 29

Chordata

Question 30

What are the 2 groups of invertebrates of Chordata?

Answer 30

Lancelets and tunicates

Question 31

Are mine animals that are bilaterally symmetrical as larvae may but not as adults

Answer 31

Echinodermata

Question 32

They move and feed by pumping water through a network of internal canals

Answer 32

Echinodermata

Question 33

Sand dollars, sea stars, and sea urchins

Answer 33

Echinodermata

Question 34

Are the simplest animals

Answer 34

Porifera (sponges)

Question 35

Are basal animals that lack tissues

Answer 35

Sponges

Question 36

A sponge’s body is like a sac perforated with

Answer 36

Pores

Question 37

As a _________ ________, sponges captures particles suspended in the water that passes through its body

Answer 37

Filter feeder

Question 38

In sponges, water is drawn into a central cavity called

Answer 38

Spongocoel

Question 39

In sponges, water is drawn into the spongocoel and flows out through the

Answer 39

Osculum

Question 40

Unlike most other animals, sponge cells are not organized into _________

Answer 40

Tissues

Question 41

What are the 2 types of sponge cell types

Answer 41

Choanocytes and Amoebocytes

Question 42

Flagellated collar cells; engulf bacteria and food particles by phagocytosis

Answer 42

Choanocytes

Question 43

The body of what type of cell, consists of two layers of cells separated by a gelatinous region called the ____________

Answer 43

Choanocytes; mesohyl

Question 44

Are totipotent cells within the mesohyl that digest food, transport nutrients, and make skeletal fibers

Answer 44

Amoebocytes

Question 45

Are hermaphrodites

Answer 45

Sponges

Question 46

In sponges, ________ develop into flagellated, swimming larvae

Answer 46

Zygotes

Question 47

In sponges, _________ eventually settle on substrate and develop into sessile adults

Answer 47

Larvae

Question 48

Are an ancient phylum of eumetazoans

Answer 48

Cnidarians

Question 49

Animals with true tissues

Answer 49

Eumetazoans

Question 50

The oldest phylum in the Eumetazoan clade

Answer 50

Cnidaria

Question 51

Includes diverse sessile motile forms

Answer 51

Cnidaria

Question 52

Corals, hydras, and jellyfish

Answer 52

Cnidaria

Question 53

Are Diploblastic with radially symmetrical bodies

Answer 53

Cnidaria

Question 54

The body plan, in Cnidaria, is a sac with a central digestive compartment called

Answer 54

Gastrovascular cavity

Question 55

What group of Eumetazoans has a single opening functions as both a mouth and an anus

Answer 55

Cnidaria

Question 56

What are the 2 variations on the body plan of Cnidaria?

Answer 56

Sessile polyp and motile Medusa

Question 57

Adhere to the substrate by the amoral end of the body (the end opposite the mouth)

Answer 57

Polyps

Question 58

A free-swimming form that has a bell-shaped body with the mouth on the underside

Answer 58

Medusa

Question 59

Are predators that use tentacles to capture and consume prey

Answer 59

Cnidarians

Question 60

On Cnidaria, ___________ are armed with cnidocytes

Answer 60

Tentacles

Question 61

Tentacles on Cnidaria have unique cells used in defense and prey capture

Answer 61

Cnidocytes

Question 62

In Cnidaria, _________ are specialized organelles within cnidocytes that eject a stinging thread

Answer 62

Nematocysts

Question 63

In Cnidaria, ______________ __________ act as a hydrostatic skeleton against which contractile cells can work

Answer 63

Gastrovascular cavity

Question 64

In Cnidaria, _____________ ______ _____ coordinates movement

Answer 64

Noncentralized nerve net

Question 65

What structures throughout the body allow Cnidarians to detect and respond to stimuli

Answer 65

Sensory

Question 66

What are the 2 clades of Cnidaria

Answer 66

Medusozoa and Anthozoa

Question 67

Jellies and sea wasp

Answer 67

Medusozoans

Question 68

Sea anemones and star corals

Answer 68

Anthozoans

Question 69

Can reproduce sexually or asexually

Answer 69

Jellies

Question 70

This clade includes all cnidarians that produce a Medusa

Answer 70

Medusozoans

Question 71

What are the 3 groups of Medusozoans

Answer 71

Scyphozoans (jellies), cubozoans (box jellies) and Hydrozoans

Question 72

Obelia, alternate between polyp and Medusa forms

Answer 72

Hydrozoans

Question 73

Rare fresh water Cnidarian, exist only in polyp form

Answer 73

Hydra

Question 74

The _________ is the predominant stage in the life cycle of most scyphozoans and cubozoans

Answer 74

Medusa

Question 75

In __________, the Medusa stage is box-shaped

Answer 75

Cubozoans

Question 76

What group of Medusozoans live in tropical oceans and have highly toxic cnidocytes

Answer 76

Cubozoans

Question 77

This Cnidarian clade only occur as polyps, include sea anemones and corals

Answer 77

Anthozoans

Question 78

In Anthozoans, _______ can be solitary or colonial

Answer 78

Corals

Question 79

Form symbiosis with algae, and secrete a hard exoskeleton or calcium carbonate

Answer 79

Corals