Answer:
the microbe Rickettsia prowazekii.
Explanation:
Answer:
Mitochondria
Explanation:
Pyruvic acid enters the mitochondria where in the presence of oxygen it is converted into acetyl coenzyme A. Acetyl coenzyme A joins the Krebs cycle in which it is broken down to carbon dioxide, water and energy which is used to produce ATP. ATP is a complex organic molecule.
Answer:
volcanoes, hurricanes, and earthquakes
Explanation:
The simple microscopic organisms the only life forms on earth was 560 million years.