Answer:
Around 4.1 billion years ago, the first single celled life form appeared on Earth
Answer:
osmosis is the movement of water molecules from a region of lower concentration to a region of higher concentration through a semi permeable membrane
Explanation:
note: osmosis only occurs in liquids
and a semipermeable is a membrane with very tiny holes that allows solvent molecules to pass through it readily but does not allow solute particles to pass through it
The answer is B, fossil fules
Nondisjunction , I'm think this is the answer but I'm not for sure.