Before the evolution of complex nervous systems, animals with very simple nervous systems, such as the nerve nets of cnidarians, could engage in all of the behaviors except

FINDING A MATE

Explanation:Cndarians are about 11000 species of animals found living in water( they are aquatic animals). The body of Cnidarians are divided into two (2) layers called EXODERM AND ENDODERM separated by MESOGLEA( a jelly-like material, Cndarians have tentacles which they can use to Sting Invaders or predators. Cnidarians are known to have Nerve nets which help them to transfer stimuli or certain nutrients but are never used to search for mates.

it is called the mitotic spindle

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