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Placozoa: Quiz

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Question 1: [1] They are the simplest in structure of all non-parasitic multicellular animals (________).
AnimalCnidariaBilateriaCtenophora

Question 2: There is no convincing fossil record of the placozoa, although the Ediacaran (Precambrian, 550 million years ago) organism ________ appears to be closely allied with this phylum.
TribrachidiumKimberellaDickinsoniaAnimal

Question 3:   - ________ and 16S rRNA analysis and phylogeny of Trichoplax adhaerens
Mitochondrial DNAMitochondrionTransfer RNAAspartate transaminase

Question 4: They are generally classified as a single species, ________, although there is enough genetic diversity that it is likely that there are multiple, morphologically similar species.
CnidariaSpongeAnimalTrichoplax

Question 5: However this may be as a result of secondary loss, so is inadequate to demark a ________.
PhylogeneticsComputational phylogeneticsGhost lineageClade







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