Which of the following statements are true? both prokaryotic organisms can have one or more cells. prokaryotic organisms are always unicellular, but eukaryotic organisms are always multicellular. prokaryotic organisms are always unicellular, but eukaryotic organisms can be either unicellular or multicellular.

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.