The three main stages of cellular respiration (aerobic) would include Glycolysis, the Kreb's Cycle and the Electron Transport Chain. The Krebs Cycle takes Citric Acid which is a derivative of Pyruvic Acid and converts this through 4 cycles into Hydrogen, carbon dioxide and water in the Mitochondrial Matrix.
Enters the left atrium...this is the oxygenated blood from the lungs (pulmonary)
Answer:carbon dioxide
Explanation:
Cause animals release carbon dioxide for plants to inhale amd exhale oxygen
The precambrian era makes up about 90% of the earths history, but there was little to no living organisms at the time other than microscopic ones. The first eukaryotes were found in the cambrian period after the precambrian period, not only that but at the end of the precambrian era in the Proterozoic era there was a mass extinction of about 70-80% of all living organisms
Answer:
eukaryotes
Explanation:
All organisms in the kingdoms Protista, Plantae, Fungi, and Animalia are eukaryotes
