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Biology 2 > Chapter 33: Ecdysozoa Slide 89 > Flashcards

Chapter 33: Ecdysozoa Slide 89 Flashcards

1
Q

Name the 6 of Ecydsozoa

A

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

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2
Q

Are tiny and live in marine sediments

A

Loricifera

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3
Q

A pocket formed by six plates, surrounds the abdomen

A

Lorica

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4
Q

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

A

Lorica

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5
Q

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

A

Priapula

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6
Q

Most species burrow in sea floor sediments

A

Priapula

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7
Q

Are major predators during the Cambrian period

A

Priapulans

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8
Q

Range from 0.5 mm to 20 cm in length

A

Priapula

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9
Q

Velvet worms

A

Onychophora

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10
Q

Originated during the Cambrian explosion

A

Onychophora

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11
Q

Have fleshy antennae and several dozen pairs of saclike legs

A

Onychophora

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12
Q

Water bears

A

Tardigrada

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13
Q

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

A

Tardigrada

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14
Q

Live in aquatic habitats, or on plants or animals

A

Tardigrada

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15
Q

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

A

Tardigrada

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16
Q

Roundworms

A

Nematoda

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17
Q

Are abundant in soil and aquatic habitats

A

Nematodes

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18
Q

Many species parasitize plants and animals

A

Nematoda

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19
Q

A tough cuticle coats their body

A

Nematoda

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20
Q

The majority of known animal species

A

Arthropoda

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21
Q

Include insets, crustaceans, and arachnids

A

Arthropods

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22
Q

Have a segmented exoskeleton with jointed appendages

A

Arthropoda

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23
Q

This group includes both invertebrates and vertebrate species

A

Deuterostomia

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24
Q

Name the 3 of Deuterostoma

A

Hemichordata, chordata, and Echinodermata

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25
Q

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

A

Hemichordata

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26
Q

Largest group of Hemichordata is the ________ worms

A

Acorn

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27
Q

Marine animals that live in mud or under rocks

A

Acorn worms (Hemichordata)

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28
Q

They can grow more than 2 m in length

A

Acorn worms (Hemichordata)

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29
Q

More than 90% of all are vertebrates

A

Chordata

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30
Q

What are the 2 groups of invertebrates of Chordata?

A

Lancelets and tunicates

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31
Q

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

A

Echinodermata

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32
Q

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

A

Echinodermata

33
Q

Sand dollars, sea stars, and sea urchins

A

Echinodermata

34
Q

Are the simplest animals

A

Porifera (sponges)

35
Q

Are basal animals that lack tissues

36
Q

A sponge’s body is like a sac perforated with

37
Q

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

A

Filter feeder

38
Q

In sponges, water is drawn into a central cavity called

A

Spongocoel

39
Q

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

40
Q

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

41
Q

What are the 2 types of sponge cell types

A

Choanocytes and Amoebocytes

42
Q

Flagellated collar cells; engulf bacteria and food particles by phagocytosis

A

Choanocytes

43
Q

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

A

Choanocytes; mesohyl

44
Q

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

A

Amoebocytes

45
Q

Are hermaphrodites

46
Q

In sponges, ________ develop into flagellated, swimming larvae

47
Q

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

48
Q

Are an ancient phylum of eumetazoans

A

Cnidarians

49
Q

Animals with true tissues

A

Eumetazoans

50
Q

The oldest phylum in the Eumetazoan clade

51
Q

Includes diverse sessile motile forms

52
Q

Corals, hydras, and jellyfish

53
Q

Are Diploblastic with radially symmetrical bodies

54
Q

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

A

Gastrovascular cavity

55
Q

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

56
Q

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

A

Sessile polyp and motile Medusa

57
Q

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

58
Q

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

59
Q

Are predators that use tentacles to capture and consume prey

A

Cnidarians

60
Q

On Cnidaria, ___________ are armed with cnidocytes

61
Q

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

A

Cnidocytes

62
Q

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

A

Nematocysts

63
Q

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

A

Gastrovascular cavity

64
Q

In Cnidaria, _____________ ______ _____ coordinates movement

A

Noncentralized nerve net

65
Q

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

66
Q

What are the 2 clades of Cnidaria

A

Medusozoa and Anthozoa

67
Q

Jellies and sea wasp

A

Medusozoans

68
Q

Sea anemones and star corals

A

Anthozoans

69
Q

Can reproduce sexually or asexually

70
Q

This clade includes all cnidarians that produce a Medusa

A

Medusozoans

71
Q

What are the 3 groups of Medusozoans

A

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

72
Q

Obelia, alternate between polyp and Medusa forms

A

Hydrozoans

73
Q

Rare fresh water Cnidarian, exist only in polyp form

74
Q

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

75
Q

In __________, the Medusa stage is box-shaped

76
Q

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

77
Q

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

A

Anthozoans

78
Q

In Anthozoans, _______ can be solitary or colonial

79
Q

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

Biology 2 (33 decks)

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