Phenylalanine, tyrosine, tryptophan. Aliphatic amino acids: These are ones which have aliphatic groups like -CH2- in between carboxylic and amine moiety. They are the ones excluding aromatic amino acids from the above list of both essential and non-essential ones.
What is a paragraph? A paragraph is a collection of related sentences dealing with a single topic. Learning to write good paragraphs will help you as a writer stay on track during your drafting and revision stages. Good paragraphing also greatly assists your readers in following a piece of writing.
Unity in a paragraph is making sure that everything flows. The paragraph should always begin with a topic sentence, such as One of the reasons the climate is changing is because of pollution. From then on, whatever is being said must support the topic sentence. If you make claims, they need to be supported by logic.