Which organism correctly completes the food web at A? 1)horses
2)mice
3)bacteria
4)trees

Answer is D. Bacteria is at the bottom of the food chain and the picture also shows bacteria which is why the answer is d bacteria

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.