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Invertebrate Biology and Ecology > Mid-Sem Exam: Characteristics of Poriferans, Cnidarians, Platyhelminthes, Nematodes and Annelids > Flashcards

Mid-Sem Exam: Characteristics of Poriferans, Cnidarians, Platyhelminthes, Nematodes and Annelids Flashcards

Memorise the characteristics of each phyla

1
Q

What type of symmetry is typical of phylum Porifera?

A

Asymmetry

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2
Q

What type of symmetry is typical of phylum Cnidaria?

A

Radial symmetry

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3
Q

What type of symmetry is typical of phylum Platyhelminthes?

A

Bilateral symmetry

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4
Q

What type of symmetry is typical of phylum Nematoda?

A

Bilateral symmetry

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5
Q

What type of symmetry is typical of phylum Annelida?

A

Bilateral symmetry

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6
Q

Are Poriferans acoelomates, pseudocoelomates, or eucoelomates?

A

Acoelomate (has no coelom)

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7
Q

Are Cnidarians acoelomates, pseudocoelomates, or eucoelomates?

A

Acoelomate (has no coelom)

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8
Q

Are Platyhelminthes acoelomates, pseudocoelomates, or eucoelomates?

A

Acoelomate (has no coelom)

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9
Q

Are Nematodes acoelomates, pseudocoelomates, or eucoelomates?

A

Pseudocoelomate (have a body cavity that is not a true coelom, as it is not derived from mesoderm)

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10
Q

Are Annelids acoelomates, pseudocoelomates, or eucoelomates?

A

Eucoelomate/coelomate (have true coeloms derived from middle germ layer)

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11
Q

Which of the phylum studied in the first five weeks have true tissues?

A

Cnidaria, Platyhelminthes, Nematoda, Annelida (and Ctenophora)

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12
Q

What is the typical feeding behaviour of Poriferans?

A

Filter feeding (sessile); exception of predatory harp sponge

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13
Q

What is the typical feeding behaviour of Cnidarians?

A

Mostly predatory, carnivorous (either by using stinging cells or filter-feeding)

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14
Q

What is the typical feeding behaviour of Platyhelminthes?

A

Mostly parasitic. Some are predators (e.g. free-living planarians)

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15
Q

What is the typical feeding behaviour of Nematodes?

A

Mostly parasitic, some free-living eat yeast/bacteria (vinegar eels)

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16
Q

What are the three types of worms (those studied) and their respective phyla?

A

Flatworms (Platyhelminthes), roundworms (Nematoda) and segmented worms (Annelida)

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17
Q

What is the typical feeding behaviour of Annelids?

A

Highly diverse; may be predators, parasites, filter feeders, detritivores etc.

18
Q

What reproductive methods are typical of phylum Porifera?

A

Hermaphrodites; may reproduce asexually by fission (budding) or sexually

19
Q

What reproductive methods are typical of phylum Cnidaria?

A

Sexual and asexual reproduction (budding), some dioecious, hermaphroditism in some species

20
Q

What reproductive methods are typical of phylum Platyhelminthes?

A

Hermaphroditism; sexual or asexual (fission), both partners may fertilise one another during an encounter (cross-fertilisation)

21
Q

What reproductive methods are typical of phylum Nematoda?

A

Some hermaphroditism, most separated into sexes; asexual (fission) and sexual reproduction

22
Q

What reproductive methods are typical of phylum Annelida?

A

Mostly dioecious, some hermaphroditism; sexual, some asexual (budding, fission)

23
Q

Are Poriferans protostomes, deuterostomes, or neither?

A

Neither (no mouth or anus)

24
Q

Are Cnidarians protostomes, deuterostomes, or neither?

A

Neither (cnidarians have one orifice that serves as both a mouth and anus)

25
Q

Are Platyhelminthes protostomes, deuterostomes, or neither?

A

Protostomes (mouth first)

26
Q

Are Nematodes protostomes, deuterostomes, or neither?

A

Protostomes (mouth first)

27
Q

Are Annelids protostomes, deuterostomes, or neither?

A

Protostomes (mouth first)

28
Q

What are the three main classes of sponges (Poriferans)?

A

Demospongiae, Homoscleromorpha, Calcarea

29
Q

What are the four main classes of Cnidarians?

A

Cubozoa, Scyphozoa, Anthozoa, Hydrozoa. (Also; Myxozoa, myoliquefaction)

30
Q

What are the four main types of Platyhelminthes?

A

Turbellaria (planarians), Trematoda (liver flukes), Monogenea (ectoparasites), Cestoda (tapeworms).

31
Q

What are the three main classes of Annelids?

A
  1. Polychaeta (bristle worms)
  2. Oligochaeta (earthworms)
  3. Hirudinea (leeches)
32
Q

Adult body form: Poriferans

A

Asymmetric; asconoid, syconoid, leuconoid

33
Q

Adult body form: Cnidarians

A

Radial; medusa, polyp

34
Q

Adult body form: Platyhelminthes

A

Bilateral; flatworms

35
Q

Adult body form: Nematodes

A

Bilateral; roundworms

36
Q

Adult body form: Annelids

A

Bilateral; segmented worms

37
Q

Germ layers: Poriferans

A

Monoblastic; one

38
Q

Germ layers: Cnidarians

A

Diploblastic; two

39
Q

Germ layers: Platyhelminthes

A

Triploblastic; three

40
Q

Germ layers: Nematodes

A

Tribloblastic; three

41
Q

Germ layers: Annelids

A

Triploblastic; three

Invertebrate Biology and Ecology (3 decks)

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