Lecture 14-Invertebrates I Flashcards Preview

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Flashcards in Lecture 14-Invertebrates I Deck (82):
1

Animals that are NOT chordates and lack backbone.

Invertebrates

2

34/35 phyla are __________.

Invertebrates

3

_____% of animal species are invertebrates.

95%

4

85% of animals are __________.

Arthropods

5

_____% of animal species are insects.

75%

6

Primitive animals were __________ and __________ with no true tissues (e.g. No muscle, nervous system, digestive system, etc).

Asymmetric and diploblastic

7

Sponges are in what phylum?

Porifera

8

Organisms in the phylum __________ are asymmetric.

Porifera

9

Organisms in the phylum Porifera are __________ and __________.

Asymmetric, diploblastic

10

Organisms in the phylum __________ have no true organs.

Porifera

11

__________ are made up of calcium carbonate or silica. They provide structural support.

Spicules

12

Collar cells

Choanocytes

13

The phylum Porifera has unique structures and cells, such as __________, __________, and __________.

Spicules, choanocytes, and amoebocytes

14

Animals with true tissues; all animals except sponges.

Eumetazoans

15

First eumetazoans have a rudimentary __________ and __________ system.

Nervous, digestive

16

First eumetazoans have __________ tissues and __________ symmetry.

Contractile, radial

17

Corals, jellyfish, and hydras are examples of:

Cnidarians

18

Two distinct body plans of the Cnidarians are:

The polyp and the medusa

19

Cnidarians are __________ symmetric and _________.

Radially, diploblastic

20

The __________ is mobile.

Medusa

21

The __________ is sessile.

Polyp

22

Cnidarians have a __________ digestive tract.

Rudimentary

23

A Cnidarian's circulatory system is called the:

Gastrovascular cavity

24

A Cnidarian's __________ __________ functions as both the digestive and the circulatory system.

Gastrovascular cavity

25

The Cnidarian's nervous system is made up of a __________ and __________.

Nerve net, ocili

26

Cnidarians have __________ structures.

Muscle-like

27

Cnidocytes contain __________.

Nematocysts

28

__________ means "stinging nettles".

Cnidos

29

__________ do not have central nervous systems.

Cnidarians

30

The three major bilateral animal groups are:

Deuterostomes, Lophotrochozoa,Ecdysozoa

31

Animals that molt an exoskeleton.

Ecdysozoa

32

In __________, there is a pocket between the mesoderm and endoderm.

Pseudocoelmates

33

In __________, the mesoderm completely fills up the space.

Acoelomates

34

In an __________, there is "no cavity".

Acoelomate

35

In __________, there are fluid-filled pockets.

Coelomates

36

Evolution of __________ tissues allows evolution of coelom.

Triploblastic

37

Platyhelminthes, Rotifera, Mollusca, and Annelida make up this bilateral animal group:

Lophotrochozoa

38

Flatworms, tapeworms, flukes, and planeria make up this phylum.

Platyhelminthes

39

Platyhelminthes have __________ guts.

Incomplete

40

__________ don't have circulatory systems.

Platyhelminthes

41

Platyhelminthes have __________ symmetry.

Bilateral

42

Platyhelminthes have __________ tissue layers.

Triploblastic

43

Are Platyhelminthes acoelomates, coelomates, or pseudocoelmates?

Acoelomates

44

Evolutionary trend that concentrates nervous tissue to one end.

Cephalization

45

Cephalization is found in __________.

Platyhelminthes

46

Platyhelminthes can be free swimming or __________.

Parasitic

47

Are humans acoelomates, coelomates, or pseudocoelmates?

Coelomates

48

Having 2 penises.

Hempharalitic

49

This phylum is known as the "wheel bearers".

Rotifera

50

Organisms in the phylum Rotifera have __________ guts.

Complete

51

Do organisms in the phylum Rotifera have circulatory systems?

No

52

Ciliated disks for feeding.

Corona

53

Organisms in the phylum Rotifera have __________.

Corona

54

Organisms in the phylum Rotifera are __________ (asexual).

Parthenogenetic

55

Most organisms in the phylum Rotifera are __________. However, some species produce non-feeding males. This is referred to as __________

Asexual, "shuffling the deck"

56

The __________ __________ separates the mouth and anus.

Alimentary canal

57

3 main parts of the phylum Mollusca:

Mantle, foot, visceral mass

58

Feeding apparatus used by the phylum Mollusca.

Radula

59

There are ranges for cephalization and nervous systems in organisms in the phylum:

Mollusca

60

Some, but not all, organisms in the phylum Mollusca have a __________ __________.

Calcium carbonate shell

61

A __________ is a unique feeding apparatus which acts like a conveyer belt. It scrapes food into the mouth.

Radula

62

The 4 classes of Mollusca are:

Polyplacophores, Gastropods, Bivalves, and Cephalopods

63

__________ are also known as chitons.

Polyplacophores

64

Polyplacophores have _____ plates, live on __________ __________, and scrape __________.

8, intertidal rocks, algae

65

Most __________ have spiraled shells.

Gastropods

66

Snails, conchs, and whelks are examples of __________.

Gastropods

67

180 degree twisting if the visceral mass is called _________.

Torsion

68

Torsion is found in __________.

Gastropods

69

Clams, oysters, mussels, and scallops are examples of __________.

Bivalves

70

Bivalves have __________ shells and __________ muscles.

Hinged, adductor

71

Squid and octopi are examples of __________.

Cephalopods

72

__________ means "head-foot".

Cephalopoda

73

Cephalopods have little to no __________.

Shell

74

The only cephalopod that has a shell is the __________.

Nautilus

75

Cephalopods are active __________.

Hunters

76

This phylum exhibits learning and complex behavior.

Cephalopoda

77

Segmented worms are in the phylum __________.

Annelida

78

Organisms in the phylum Annelida have __________ guts.

Complete

79

Organisms in the phylum Annelida have __________ circulatory systems.

Closed

80

Organisms in the phylum Annelida show __________ cephalization.

Some

81

Some organisms in the phylum Annelida possess __________.

Parapodia

82

Lateral feet (foot-like projections).

Parapodia