different between tells vs tels

tells

tells From the web:

• what tells a ribosome how to assemble a protein
• what tells your cells what to do
• what tells the hardware what to do and how to do it
• what tells the story of a chemical reaction
• what tells the heart to beat
• what tells the ac compressor to turn on
• what tells you population density
• what tells the ribosome to start

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tels

tels From the web:

• what tesla drives itself
• what teslas have autopilot
• what tesla is the cheapest
• what tesla should i get
• what tesla is the fastest
• what tesla has the longest range
• what tesla model is the cheapest
• what tesla is the best