Which of these organisms would you find DNA molecules Only in humans
Only in humans and butterflies
In humans butterflies and trees
And none of these organisms

DNA can be found in humans, butterflies and trees as mentioned in this question.

DNA:

DNA means deoxyribonucleic acid. It is a biological molecule that stores genetic information in living cells. DNA encodes the genetic information that is passed across to offsprings in all living cells. The genetic information is stored in the nucleotide base sequence that makes up the DNA molecule. Since DNA (genetic material) is present in every living organism, therefore, DNA can be found in humans, butterflies and trees.

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You would most likely to find DNA molecules in humans, butterflies and trees because they are all living things.

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.