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Biology Lab > Phylum Platyhelminthes, Nematoda and Mollusca > Flashcards

Phylum Platyhelminthes, Nematoda and Mollusca Flashcards

1
Q

Platyhelminthes Eukaryotic or Prokaryotic?

A

Eukaryotic

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2
Q

Platyhelminthes Radiata or Bilateria?

A

Bilateria

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3
Q

Platyhelminthes Dueterstomia or Protosomia?

A

Neither

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4
Q

Platyhelminthes Pseudocoelomate, Acoelomate or Coelomate?

A

Acoelomate

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5
Q

Platyhelminthes Triploblastic or Diploblastic?

A

Triploblastic

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6
Q

Platyhelminthes Invertebrate or Vertebrate?

A

Vertebrate

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7
Q

Phylum Platyhelminthes Class Turbellaria

A

Planaria – Dugesia free living – freshwater – marine – some terrestrial – ciliated body surface – three tissue layers – no coelom

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8
Q

Phylum Platyhelminthes Class Monogenea

A

marine and freshwater ectoparasite – external/fishes – ciliated larva

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9
Q

Phylum Platyhelminthes Class Trematoda

A

(flukes) – parasites – mostly vertebrates – two suckers attach to host – lifecycles frequently include intermediate and definitive (reproductive) hosts

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10
Q

Phylum Platyhelminthes Class Cestoda

A

Tapeworms – attach with a scolex – proglottids produce eggs and sperms – no head or digestive system – life cycle includes one or more intermediate hosts

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11
Q

Phylum Nematoda Eukaryotic or Prokaryotic?

A

Eukaryotic

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12
Q

Phylum Nematoda Bilateria or Radiata

A

Bilateria

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13
Q

Phylum Nematoda Dueterstomia or Protostomia?

A

Protostomia

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14
Q

Phylum Nematoda Acoelomate, Pseudocoelomate or Coelomate?

A

Pseudocoelomate

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15
Q

Phylum Nematoda Diploblastic or Triploblastic?

A

Triploblastic

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16
Q

Phylum Nematoda Invertebrate or Vertebrate?

A

Invertebrate

17
Q

Roundworms

A
  • Terrestrial, Aquatic and Parasitic
  • Important decomposers – returning organic material to the ecosystem
  • Pseudocoelom - not lined with mesentery
  • Cuticle – protects parasite from digestive activity of host
18
Q

Phylum Mollusca Eukarytoic or Prokarytoic?

A

Eukaryotic

19
Q

Phylum Mollusca Radiata or Bilateria?

A

Bilateria

20
Q

Phylum Mollusca Dueterstomia or Protostomia?

A

Protostomia

21
Q

Phylum Mollusca Acoelomate, Pseudocoelomate or Coelomate?

A

Coelomate

22
Q

Phylum Mollusca Diploblastic or Triploblastic?

A

Triploblastic

23
Q

Phylum Mollusca Invertebrate or Vertebrate?

A

Invertebrate

24
Q

Mollusca

A
  • Three tissues – torsion
  • Calcareous shells – muscular foot
  • Bilateral symmetry
  • Unique feature – radula – lung
  • Terrestrial and aquatic forms
  • Sexual reproduction – exception; snails, slugs and nudibranchs (monoecious – hermaphroditic)
  • Some feed on plants – some are filter feeders- some are carnivores
25
Q

Mantle

A

Mollusks have a special epidermal tissue that secretes its shell

26
Q

Radula

A

scraping tongue like organ – modified in the Cephalopods

27
Q

Molluscan Classes Polyplacophora

A

– commonly called Chitons sp.

  • They are dioecious, marine mollusks
  • External shell – 8 plates
  • Ventral foot
  • Reduced Head with mouth and radula
  • Open circulatory system
28
Q

Molluscan Classes Gastropoda

A
  • the snails
  • Well developed head
  • Muscular foot
  • External shell in most (reduced/not present in the nudibranchs & slugs
  • Radula and open circulatory system
  • Most dioecious but land snails, nudibranchs and slugs tend to be monoecious
  • Marine terrestrial & freshwater representatives
29
Q

Molluscan Classes Bivalvia

A
  • Clams, muscles, scallops and oysters
  • External shell – two halves
  • Muscular foot
  • Open Circulatory System
  • Lack head and radula (filter feeders)
  • Dioecious
  • Inhabit Marine and Freshwater
30
Q

Cephalopoda

A
  • Squids, octopuses and chambered nautiluses
  • Well developed head - closed circulatory system
  • Marine
  • Head surrounded by grasping tentacles (2) – arms (8) - usually with suckers – eyes present
  • Shell internal, external or absent
  • Have a modified radula (beak)
  • Locomotion by jet propulsion – muscular expelling water from tube formed by the mantel

Biology Lab (8 decks)

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