Gene expression can be turned on and off by
1) sequencing
2) signaling
3) morphing
cytokines regulate gene expression, allowing for cell replication and
1) transport
2) division
3) nourishment
the gibberellin hormone causes in plants
1) seed germination
2) plant fertilization
3) cellular reproduction

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.