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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
describe the path of the digestion for Subclass Oligochaeta. (4)
esophagus -> crop ->gizzard -> intestine
26
how many setae does Subclass Oligochaeta have?
few on the ventral surface
27
what kinds of organisms are in Subclass Hirudinea? (2)
leeches, ectoparasites
28
what class does Subclass Hirudinea belong to?
Class Clitellata
29
are members of Subclass Hirudinea monoecious or dioecious?
monoecious
30
do members of Subclass Hirudinea have setae?
no setae
31
what kind of development do members of Subclass Hirudinea undero?
direct development
32
what kind of septa does Subclass Hirudinea have? (2)
no internal septa, but they do have annuli
33
what feature do members of Subclass Hirudinea exhibit when reproductive?
clitellum
34
Hirudinea: small anterior sucker
with a mouth for attachment and feeding
35
Hirudinea: large posterior sucker
mainly for locomotion but also attachment
36
What features of Class Polychaeta would lead you to believe that they are free-living predators? (4)
- parapodia used in locomotion - fangs for capturing and subduing prey - no structures for attaching to host - sensory structures on the head
37
Whats the function of acicula in Polychaetes?
structural support for the setae and parapodia
38
Body undulations, which help the Polychaete worms move rapidly, are produced by what muscles (if any)? (2)
- 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
What is the correct order in which food passes through the earthworm? (7)
1. mouth 2. pharynx 3. esophagus 4. crop 5. gizzard 6. intestine 7. anus
40
What anatomical similarities do you see among leeches, earthworms, and sandworms? (2)
- a complete digestive system - repeated internal structures like nephridia, reproductive structures, and hearts
41
Which os the following is a trait that Platyhelminthes and Annelida share that is not found in Cnidaria?
triploblastic development
42
What is the two major distinguishing features of Annelida?
coelom and metamerism
43
Why must terrestrial annelids such as earthworms maintain a moist skin surface?
to allow gas exchange to occur across the epidermis
44
what taxa does the common earthworm belong to?
Subclass Oligochaeta
45
what taxa do sandworms belong to?
Class Polychaeta
46
what taxa do leeches belong to?
Subclass Hirudinea
47
what taxa are free-living freshwater or terrestrial worms with setae?
Subclass Oligochaeta | Phylum Annelida, Class Clitellata
48
what taxa are ectoparasites with suckers for feeding and lack setae and parapodia?
Subclass Hirudinea
48
what taxa are marine worms with parepodia?
Class Polychaeta
49
What is structure A?
longitudinal muscles
50
what is structure B?
ventral nerve cord
51
what is structure C?
circular muscle
52
what structures are line D?
acicula
53
what is structure E?
parapodium
54
What Phylum and Subclass does this specimen belong to?
Annelida, Oligochaeta
55
what is the function of A?
reproduction, stores sperm until needed
56
what system does C belong to?
circulatory system
57
Fully name these specimen.
Phylum Annelida Class Polychaeta
58
What are these specimen?
Phylum Annelida Class Polychaeta
59
What are these specimen?
Phylum Annelida Class Clitellata Subclass Oligochaeta
60
What are these specimen?
Phylum Annelida Class Clitellata subclass Hirudinea
61
What is this specimen?
a c.s. of Neresi from Class Polychaeta
62
what is Annelida development? (3)
triploblastic, eucoelomate, and protostomes
63
What kind of circulation does Phylum Annelida have?
a closed circulatory system
64
what do parapodia assist with? (2)
locomotion and gas exchange

Animal Diversity Lab (11 decks)

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