Answer:
Mitochondria are tiny organelles inside cells that are involved in releasing energy from food. This process is known as cellular respiration. It is for this reason that mitochondria are often referred to as the powerhouses of the cell.
Answer:
4.54 billon years
Explanation:
the earliest time that life forms first appeared on Earth is at least 3.77 billion years ago possibly as early as 4.28 billion years
Hydrogen and oxygen cells combine explosively combine.-answers.com
I found this online. on answers.com so I do not own credit.
The point on earth's surface directly above an earthquakes focus (hypocenter) is called the epicenter.
