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.
Antennae pick up these message with the help of others.