What is the sentence order in Spanish?
Subject + Verb + sentence. However, this is flexible and can be changed.
What is the difference between an endothermic and exothermic reaction?
In endothermic reactions, energy is absorbed in the form of heat while in exothermic reactions, energy is released in the form of heat.
Why is influenza an unique virus?
The influenza virus performs antigenic shift, changing the subtype of the virus frequently. These small changes reduce the effectiveness of your immune response against the virus, and is one of the reasons you need a yearly vaccine against influenza.