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Biol 1620 > Invertebrates > Flashcards

Invertebrates Flashcards

1
Q

T/F most knows species are invertabrate

A

True

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2
Q

Which are always protosomes

A

Acoelomates and psuedocoelomates

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3
Q

What can be protosome or dueterosome

A

Coelomates

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4
Q

What phylum are sponges in

A

porifera

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5
Q

what are features of sponges differentiated than that for other animals

A

They lack true tissue

They lack organs

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6
Q

Body plan of Cnidarians

A

Diploblastic

Radial symmetry

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7
Q

What are the 4 classes of cnidarians

A

Hydrozoa
scyphozoa
cubozoa
anthozoa

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8
Q

How is body plan of cnidarian basic.

A

They are a sac with a gastrovascular cavity

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9
Q

Two body type variations of cnidarians

A

Polyp

medusa

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10
Q

How is polyp distinguished from medusa

A

Mouth is facing up

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11
Q

What is the prevalent form of Syphozoa

A

Medusa

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12
Q

Example of Hyrdozoa

A

Colonial polyps

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13
Q

Example of scyphozoa

A

Jelly fish

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14
Q

Example of Cubozoa

A

Box jellies

Sea wasp

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15
Q

Example of anthozoa

A

sea anemone

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16
Q

Significant trait of cubozoa

A

Complex eyes

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17
Q

What form stage are anemones and corals found in

A

polyp

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18
Q

What type of tissue are bilaterians

A

Triploblastic

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19
Q

Organisms in Lophotrochozoa

A

Flat worms, rotifers, ectoprocts, barchiopods, molluscs and annelids.

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20
Q

How is Lophotrochozoa grouped together

A

Molecular data

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21
Q

What phylum are flatworms in

A

Platyhelminthes

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22
Q

What Type of body tissue do flatworms have

A

Triploblastic

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23
Q

T/F Flatworms are coelomates

A

False

they are Acoelomates

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24
Q

T/F Flatworms have a gastrovascular cavity

A

True

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25
Q

Phylum for Rotifers

A

Rotifera

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26
Q

Habitat for rotifers

A

Fresh and ocean water

Damp soil

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27
Q

T/F Rotifers are smaller than protists AND are multicellular

A

True

28
Q

T/F rotifers do not have specialized organ systems

A

False

29
Q

T/F rotivers have teeth

A

False,

Mouth contains cillia

30
Q

Define Alimentary canal

A

digestive tube with mouth at one end and anus at the other floating in a pseudocoelom

31
Q

How do rotifers Reproduce

A

There are no males,

Females produce offspring from unfertilized eggs

32
Q

New name for rotifers

A

Syndermata

33
Q

Examples of molluscs

A

Chitons, snails, oysters, squids

34
Q

chitons

A

8 segmented body

35
Q

T/F Gastropods are a diverse gorup

A

True

3/4 of all species

36
Q

Define: Torsion

A

When the anus ends up by the neck. Gastropods

37
Q

Examples of Molluscs: Class Bivalvia

A

Clams, oysters, mussels, scallops

38
Q

What is significant about bivalvia

A

THey are suspension feeders

39
Q

Examples of Molluscs: Class Cephalopoda

A

Squids, octopuses, carnivores.

40
Q

What are Nautiloidea (ammonites)

A

Ancient cephalopods

41
Q

T/F Nautiloids have been found atop utah mountains

A

true

42
Q

Identifying feature of Annelids

A

bodies made of fused rings

43
Q

Three groups in annelids

A

Oligochaeta
Polychaeta
hirudinea

44
Q

Significant feature of Oligochaetes

A

Have sparse chaetae bristles made of chitin

45
Q

Polychaetes

A

Contain paddle like parapodia that work for gills and movement

46
Q

Class of Leeches

A

Hirudinea - blood sucking parasites

Secrete hirudin to prevent coagulation

47
Q

Define Chaetae

A

bristle made of chitin

48
Q

Groups of Ecdysozoans

A

Nematodes

arthropods

49
Q

Significant structure of Ecdysozoans

A

Cuticle covering body that is molted

50
Q

Nematods are:

A

Predetors that are largely parasites

51
Q

T/F Anthropods are a diverse group.

A

T

2/3 of known species

52
Q

Body plan of anthropods

A

segmented exoskeleton w/ jointed appendages

Early there wasn’t differentiation between segments

53
Q

Four subphyla of anthropods

A

Cheliceriformes (Arachnida)
Myriapoda (millipedes)
Hexapod (insects)
Crustacea (crabs etc.)

54
Q

Significance of hox genes in anthropods

A

decrease in number of segments and increase in appendage specialization

55
Q

What as promoted with Jointed appendages

A

fitness

56
Q

Significant structures of millipedes

A

Oldest with jaws

2 legs per “trunk” believed to be the first to make it to land

57
Q

T/F Hexapods were the first to develop wings

A

True

58
Q

Why did Hexapods “shrink”

A

as available oxygen declined, circulatory systems needed to be smaller

59
Q

Features of crustacians

A

Jointed appendages for locomotion and feeding. Have two antenna

60
Q

Common Echinoderms

A

Starfish

61
Q

T/F echinoderms are closest relative to Chordates

A

True

62
Q

Shared Characteristic of echinoderm and chordates

A

Dueterstome
Mouth develops at the opposite end of blastopore
Triploblastic

63
Q

Endoskeleton Features of echinoderms

A

Thin layer of epidermis

Hard/ calcium carbonate

64
Q

T/F Echinoderm nervous system has a brain and head

A

Fasle,

Nervous system exists but no brain and head is present

65
Q

T/F Initial development of echinoderms is bilateral

A

True

Biol 1620 (12 decks)

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