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Biology 1020 > Annelida > Flashcards

Annelida Flashcards

1
Q

the two clades in Annelida

A
  1. Errantia
  2. Sedentaria
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2
Q

Annelida means

A

little rings

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3
Q

describe the body of annelida

A

segmented worms

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4
Q

where do Annelia live

A

marine
aquatic
terrestrial

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5
Q

least to most inclusive

A

Phylum Annelida: Lophotrochozoan: Bilaterian: Eumetazoan: Metazoan

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6
Q

traits of Annelida

A
  1. ALL have segmented bodies
  2. complete gut with mouth and anus
  3. sophisticated nervous, circulatory, reproductive and excretory systems
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7
Q

describe the development of Annelida (4)

A
  1. bilaterian (bilateral symmetry)
  2. triploblastic
  3. coelomates
  4. Protostome
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8
Q

sexual reproduction in annelids can be via

A

hermaphroditism OR dioecy

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9
Q

clade Errantia are ______ (mobile or sessile)

A

mobile

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10
Q

clade Errantia habitat

A

marine

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11
Q

what is one trait that many species in clade Errantia share

A

pair of paddle-like or ridge-like structures called parapodia

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12
Q

what do each parapodium have in clade Errantia

A

numerous chaetae bristles made from chitin

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13
Q

are parapodia unique ONLY to clade Errantia

A

NO

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14
Q

function of parapodia

A
  1. locomotion
  2. respiration
  3. predator behavior
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15
Q

do clade Errantia have well-developed jaws

A

YES

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16
Q

do clade Errantia show cephalization

A

YES

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17
Q

example of a species in clade Errantia

A

polychaete

18
Q

least to most inclusive

A

Polychaete: clade Errantia: phylum Annelida: Lophotrochozoan: Bilateria: Eumedazoa: Medazoan

19
Q

Clade Sedentarians are ______(mobile/sessile)

A

TEND to be less mobile

20
Q

Clade Sedentarians habitats

A
  1. some burrow into the substrate
  2. some live in protective tubes
21
Q

what do tube-dwelling Sedentarians have

A

elaborate gills or tentacles used for filter feeding

22
Q

what sepcies are included in Clade Sedentarians

A
  1. tubeworms
  2. leeches
  3. earthworms
23
Q

least to most inclusive

A

Christmas Tree Worm: Clade Sedentarians: Annelida: Lophotrochozoan: Bilaterian: Eumetazoan: Metazoan

24
Q

Clade Sedentarians habitats

A
  1. marine
  2. terrestrial
  3. aquatic
  4. ice
25
Q

earthworm movement VS Nematode movement

A

earthworms have BOTH longitudinal and circular muscles while Nematodes have ONLY longitudinal

26
Q

earthworm circulatory system

A

closed

27
Q

do earthworms have a brain

A

NO- they aren’t predators so they don’t need a prominent mass of sensory organs

28
Q

how many chaetae per segment in earthworms

A

8

29
Q

what structure is associated with excretion in earthworms

A

Metanephridium

30
Q

Metanephridium function

A
  1. removes fluid waste through pores
  2. solid waste it removed by the anus
31
Q

what does the coelom act as in earthworms

A

a hydrostatic skeleton

32
Q

what do chaetae provide in earthworms

A

traction

33
Q

how do earthworms gain their nutrients

A

eat through soil, extracting nutrients as the soil moves through their alimentary canal

34
Q

reproduction in earthworms

A

they are hermaphrodites BUT cross-fertilize (swap sperm)

35
Q

can earthworms reproduce asexually

A

some can by fragmentation

36
Q

leeches belong to

A

Clade Sedentarians

37
Q

leech habitats

A
  1. most are freshwater
  2. some are marine or terrestrial
38
Q

most leeches are

A

parasitic

39
Q

specialized trait for parasitic leeches

A

secrete a chemical called hirudin to prevent blood from coagulating

40
Q

adaptions of the leech for their parasitic way of life

A
  1. flattened body
  2. reduced coelom
  3. chaetae are absent
  4. suckers at BOTH anterior and posterior ends
41
Q

least to most inclusive

A

leeches: Clade Sedentarians: Annelida: Lophotrochozoan: Bilaterian: Eumetazoan: Metazoan

Biology 1020 (29 decks)

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