How long can primary succession take to be completed?
a. ten to hundreds of years
b. hundreds to ten thousands of years
c. thousands to millions of years
d. hundreds to thousands of years

Primary succession can take hundreds to thousands of years to be completed.

Hope this helps :)

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.