Your answer would be D, because these are all relating to how the actions of the scientists will affect the environment and/or organisms.
Answer:
Mutations increase genetic variation and the potential for individuals to differ
Explanation:
Mutations can result in an organism having a new allele. When that organism produces offspring their offspring are most likely to inherit the allele created from the mutation which could potentially lead to genetic variation.
Answer;
Endocytosis process
The vesicular process involved in the toxin entering the neuron is endocytosis process.
Explanation;
Endocytosis is a vesicular process, that involves capturing a particle or a substance from the outside of a cell by engulfing it with the cell membrane, and bringing it into the cell.
Botulinum toxin binds to the neuronal cell membranes at the nerve terminus and enters the neuron by endocytosis.