Some drugs, such as heroin and oxycontin, mimic the size and shape of a neurotransmitter. Imagine that someone
added some green beads (to represent heroin molecules) to
the synapse. These green beads are the same size and
shape as the red beads. What might happen in the receiving
neuron if heroin was present in the synapse?

answer:

it could come from a variety of sources.

explanation:

..although it was most likely developed through zoonotic transmission, where an infectious disease which usually afflicts when animals jump to humans.

answer:

Our freedom of choice in a competitive society rests on the fact that, if one person refuses to satisfy our wishes, we can turn to another. But if we face a monopolist we are at his absolute mercy. ... There is no consensus as to whether an increase in economic freedom of choice leads to an increase in happiness.

Explanation:

It is so important to understand that we are all making choices all the time, even when we chose not to choose we have still made a choice. It is our choices that determine our experiences. ... Unless we are willing to take full responsibility for ourselves and the choices we make, we have no control over our lives

they should make the law strict.

Explanation:

Not to go outside. In some countries they are taking strict action for those who are going outside and allow testing for all without appointment maybe.