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Animal Diversity Lab > Lab 6 - Annelida > Flashcards

Lab 6 - Annelida Flashcards

1
Q

what is the main feature of Phylum Annelida?

A

metamerism

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2
Q

metamerism

A

repeated body segments

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3
Q

homonomous metamerism

A

body segments are more or less the same

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4
Q

heteronomous metamerism

A

segments are different

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5
Q

annuli

A

outer rings that separate metameres, external evidence of septa

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6
Q

metameres internally separated by _____

A

septa

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7
Q

septa

A

thin layers of tissue in which organs/nerves can pass through

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8
Q

incomplete septa

A

leave an open space in the middle

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9
Q

complete septa

A

completely seal off metameres

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10
Q

What classes do you need to know for Phylum Annelida? (2)

A

Classes Polychaeta and Class Clitellata

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11
Q

Class Polychaeta has what kinds of organisms? (2)

A

sandworms and marine worms

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12
Q

where can members of Class Polychaete found?

A

mostly marine species

Phylum Annelida

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13
Q

Are members of Class Polychaeta monoecious or dioecious?

A

mostly monoecious with some dioecious species

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14
Q

what kind of septa does Class Polychaeta have?

A

incomplete septa

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15
Q

what kind of development Class Polychaeta display?

A

indirect development - trochophore larva

Annelida

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16
Q

parapodia

A

feet like body extensions with setae

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17
Q

setae

A

bristles

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18
Q

what are parapodia for?

A

aid in locomotion and increase surface area for gas exchange

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19
Q

acicula

A

larger support spikes for parapodia

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20
Q

What Class does Subclass Oligochaeta belong to?

A

Class Clitellata

Phylum Annelida

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21
Q

where are members of Subclass Oligochaeta? (3)

A

includes earthworms, with some aquatic and marine species

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22
Q

clitellum

A

secretes a mucus sheath to enclose fertilized eggs as they are released

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23
Q

What kind of development does Subclass Oligochaeta display?

A

direct development

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24
Q

what kind of septa does Subclass Oligochaeta exhibit?

A

complete septa

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25
Q

describe the path of the digestion for Subclass Oligochaeta. (4)

A

esophagus -> crop ->gizzard -> intestine

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26
Q

how many setae does Subclass Oligochaeta have?

A

few on the ventral surface

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27
Q

what kinds of organisms are in Subclass Hirudinea? (2)

A

leeches, ectoparasites

28
Q

what class does Subclass Hirudinea belong to?

A

Class Clitellata

29
Q

are members of Subclass Hirudinea monoecious or dioecious?

A

monoecious

30
Q

do members of Subclass Hirudinea have setae?

A

no setae

31
Q

what kind of development do members of Subclass Hirudinea undero?

A

direct development

32
Q

what kind of septa does Subclass Hirudinea have? (2)

A

no internal septa, but they do have annuli

33
Q

what feature do members of Subclass Hirudinea exhibit when reproductive?

A

clitellum

34
Q

Hirudinea: small anterior sucker

A

with a mouth for attachment and feeding

35
Q

Hirudinea: large posterior sucker

A

mainly for locomotion but also attachment

36
Q

What features of Class Polychaeta would lead you to believe that they are free-living predators? (4)

A
  • parapodia used in locomotion
  • fangs for capturing and subduing prey
  • no structures for attaching to host
  • sensory structures on the head
37
Q

Whats the function of acicula in Polychaetes?

A

structural support for the setae and parapodia

38
Q

Body undulations, which help the Polychaete worms move rapidly, are produced by what muscles (if any)? (2)

A
  • accomplished by circular, longitudinal, and parapodia muscles and coelomic fluid
  • produced by the contraction of longitudinal muscles stimulated by the backward stroke of parapodium of a particular segment
39
Q

What is the correct order in which food passes through the earthworm? (7)

A
  1. mouth
  2. pharynx
  3. esophagus
  4. crop
  5. gizzard
  6. intestine
  7. anus
40
Q

What anatomical similarities do you see among leeches, earthworms, and sandworms? (2)

A
  • a complete digestive system
  • repeated internal structures like nephridia, reproductive structures, and hearts
41
Q

Which os the following is a trait that Platyhelminthes and Annelida share that is not found in Cnidaria?

A

triploblastic development

42
Q

What is the two major distinguishing features of Annelida?

A

coelom and metamerism

43
Q

Why must terrestrial annelids such as earthworms maintain a moist skin surface?

A

to allow gas exchange to occur across the epidermis

44
Q

what taxa does the common earthworm belong to?

A

Subclass Oligochaeta

45
Q

what taxa do sandworms belong to?

A

Class Polychaeta

46
Q

what taxa do leeches belong to?

A

Subclass Hirudinea

47
Q

what taxa are free-living freshwater or terrestrial worms with setae?

A

Subclass Oligochaeta

Phylum Annelida, Class Clitellata

48
Q

what taxa are ectoparasites with suckers for feeding and lack setae and parapodia?

A

Subclass Hirudinea

48
Q

what taxa are marine worms with parepodia?

A

Class Polychaeta

49
Q

What is structure A?

A

longitudinal muscles

50
Q

what is structure B?

A

ventral nerve cord

51
Q

what is structure C?

A

circular muscle

52
Q

what structures are line D?

A

acicula

53
Q

what is structure E?

A

parapodium

54
Q

What Phylum and Subclass does this specimen belong to?

A

Annelida, Oligochaeta

55
Q

what is the function of A?

A

reproduction, stores sperm until needed

56
Q

what system does C belong to?

A

circulatory system

57
Q

Fully name these specimen.

A

Phylum Annelida
Class Polychaeta

58
Q

What are these specimen?

A

Phylum Annelida
Class Polychaeta

59
Q

What are these specimen?

A

Phylum Annelida
Class Clitellata
Subclass Oligochaeta

60
Q

What are these specimen?

A

Phylum Annelida
Class Clitellata
subclass Hirudinea

61
Q

What is this specimen?

A

a c.s. of Neresi from Class Polychaeta

62
Q

what is Annelida development? (3)

A

triploblastic, eucoelomate, and protostomes

63
Q

What kind of circulation does Phylum Annelida have?

A

a closed circulatory system

64
Q

what do parapodia assist with? (2)

A

locomotion and gas exchange

Animal Diversity Lab (11 decks)

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