Reaction to the outside environment and or reaction to stimuli.
All viruses contain nucleic acid, either DNA or RNA (but not both), and a protein coat, which encases the nucleic acid. Some viruses are also enclosed by an envelope of fat and protein molecules. In its infective form, outside the cell, a virus particle is called a virion.
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A syllabus is crucial to the success of any teacher because it maps out exactly what you have to do every day in your class. It basically serves as a semester- or quarter-long reminder about every detail you need to cover with students
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