Epigenetic differences in Andean highlanders ^{CEFR A1}

Difficult words

• scientist — person who studies nature or science

  Scientists
• indigenous — original people of a place or region
• oxygen — gas in air people need to breathe
• gene — small part of cells that gives instructions
• signal — sign that shows information or a change

  signals
• artery — blood vessel that carries blood from heart

  arteries

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