Q.

Which of the following statement is incorrect?

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a

Platyhelminthes has incomplete digestive system.

b

 In coelenterates, the arrangement of cells is more complex.

c

Nereis is monoecious but earthworms and leeches are dioecious.

d

Simple and compound eyes are present in the animals of those phylum whose over two-thirds of all named species on earth are arthropods.

answer is C.

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Detailed Solution

Nereis is dioecious but earthworms and leeches are monoecious.

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