Eyes with single lenses that respond to light and darkness are found in many arthropods; these are the

The answer is Ocelli.

The brainest answer with be appreciated.

Neurotransmitters are messengers responsible for communication between neurons. they are released from synaptic vesicles and are received by receptors.  the communication is referred to as neurotransmission. the following statement is true about neurotransmitters: a. they're stored in synaptic vesicles in the axon.