Q. Read the following statements and find out the correct statement.
. Cnidoblasts are used for anchorage, defense and for the capture of prey
. The property of living organism to emit light is called bioluminescence
. Porifers, sea walnuts, platyhelminthes and earthworms are monoecious or hermaphrodite
. Aschelminthes, molluscs, echinoderms and hemichordates are dioecious or unisexual
. Vertebrates have ventral muscular heart; kidneys for excretion and osmoregulation and paired appendages (fins or limbs)

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Solution:

All are correct statements.
• Cnidoblasts are used for anchorage, defense and for the capture of prey.
• The property of living organism to emit light is called bioluminescence.
• Porifers, sea walnuts, platyhelminthes and earthworms are monoecious or hermaphrodite.
• Aschelminthes, molluscs, echinoderms and hemichordates are dioecious or unisexual.
• Vertebrates have ventral muscular heart, kidney for excretion and osmoregulation and paired appendages (fins or limbs).