Sore Throat. Initial symptoms of mononucleosis include a sore throat that worsens over a few days. White patches may cover the tonsils, according to Medline Plus. The sore throat symptoms may mimic a bacterial strep throat infection, but antibiotics will not improve the condition.
The most important difference between sale and agreement to sell is A contract of sale is an example of Executed Contract whereas the Agreement to Sell is an example of Executory Contract.
1. The Sales Concept focuses on the needs of the seller. The Marketing Concept focuses on the needs of the buyer.. 2. The Sales Concept is preoccupied with the sellers need to convert his/her product into cash.  The Marketing Concept is preoccupied with the idea of satisfying the needs of the customer by means of the product as a solution to the customers problem (needs).