Rearrange the following--
a)to pass messages / smelly chemicals / pheromones are / secreted by / some insects.
b)Antennae / others / message with the / pick up these / help of

Phormones are smelly chemicals secreted by some insects to pass messages.

Antennae pick up these message with the help of others.
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phormones are smelly chemicals by some insects to pass messages
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