There are two types of vesicular transport processes, exocytosis and endocytosis. Endocytosis is the process which is involved in the toxin entering the neuron. This process is where cells intake waste or chemical transmitters which are suspended or dissolved in the extracellular fluid around the cell. <span />
<span>(2) a diatomic molecule is the correct answer.
When two atoms of Br bond together, they will form bromine gas with a chemical formula of Br2. Therefore, it is called a diatomic molecule. (the word "di" means two).
Hope this helps~
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