Answer:A radical (often, but unnecessarily called a free radical) is an atom or group of atoms that have one or more unpaired electrons. ... A prominent feature of radicals is that they have extremely high chemical reactivity, which explains not only their normal biological activities, but how they inflict damage on cells.
Explanation:CAN I GET BRAINLIEST PLZZZZZZZZZZZ
Answer #1: instinctual trait
Answer#2: learned trait
Approximately 1,000 to 30,000 years old
Answer:
Its internal volume enlarges and the cell membrane expands
Explanation:
