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BI488- Invertebrate Conservation > Week 9 > Flashcards

Week 9 Flashcards

1
Q

T or F: Acoelomate bilaterans are triploblastic

A

T

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2
Q

what are the two types of muscles in platyhelminthes

A

longitudinal and circular muscle

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3
Q

T or F: there are free living and symbiotic platyhelminthes

A

T

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4
Q

free living platyhelminthes have a _____ epidermis with ______

A

ciliated, rhabdites

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5
Q

how do free living platyhelminthes feed

A

mid-body mouth, protruding pharynx

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6
Q

how do symbiotic platyhelminthes feed

A

anterior mouth

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7
Q

what are protonephridia

A

flame cells: osmoregulatory function and deal with fluid balance

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8
Q

T or F: phylum platyhelminthes can either have a simple or complex nervous system

A

T

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9
Q

What is the difference between the simple and complex nervous system

A

simple has a subdermal nervous nerve plexus, whereas complex has a CNS

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10
Q

how do platyhelminthes reproduce asexually

A

fission

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11
Q

why is segmentation important in annelids

A

allowed for evolution

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12
Q

coelom forms in annelids by _____

A

schizocoely

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13
Q

what are setae

A

present in annelids, tiny chitinous bristles that prevent them from slipping backwards

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14
Q

what are the different types of annelids

A

polychaetes, earthworms and leeches

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15
Q

T or F: annelids have both circular and longitudinal muscle

A

T

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16
Q

what is the pygidium

A

the last segment in annelids

17
Q

what is the prostromium

A

segment with sensory cells including the eyes

18
Q

what are the two parts of the parapodim

A

noto and neuropodum

19
Q

what class of annelids are the most important in marine enviornments

A

polychaetes

20
Q

what are some characteristics of polychaetes

A

well differentiated head, paired parapodia, no citellum, jaws or tentacles

21
Q

T or F: polychates are a true class

A

F

22
Q

T or F: polychaetes have the best developed organs

A

T

23
Q

what are parapodia used for

A

crawling, swimming, or achoring in tubes

24
Q

what are errant polychaetes

A

predators and scavengers, mobile

25
Q

why are the major invertebrate taxa difficult to accurately estiamte

A

undersampled and understudied, some taxonomists differ within species identification

26
Q

what is the functional role of porifera in coral reef

A

numerous symbiotic relationships with microorganisms,

27
Q

T or F: soft corals have less diversity than the hard corals

A

F

28
Q

what are sipuncula

A

peanut worms

29
Q

what are decapods

A

crayfish,crabs,lobsters,shrimp

30
Q

how are shrimps (malacostracta) important for coral reefs

A

commensals on invertebrate hosts, mutualistic relationshops with fish (cleaner shrips)

31
Q

how do crabs help coral reefs

A

some live symbiotically with corals, feed on mucus, ingest coral tissues etc

BI488- Invertebrate Conservation (10 decks)

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