Q.
Excretory structure is absent in
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a
Fasciola
b
Ascaris
c
Apis
d
Asterias
answer is D.
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Detailed Solution
Asterias (Echinodermata) has no specific excretory structures but tube feet help in it partly.Apis (Terrestrial arthropods) - Malpighian tubules.Ascaris (Aschelminthes) - Excretory tube removes body wastes from the body cavity through the excretory pore.Fasciola (Platyhelminthes) - Flame cells.
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