Photosynthesis is the process whereby oxygen is produced and is released into the atmosphere.
Mitochondria are unusual organelles. They act as the power plants of the cell, are surrounded by two membranes, and have their own genome. They also divide independently of the cell in which they reside, meaning mitochondrial replication is not coupled to cell division. Some of these features are holdovers from the ancient ancestors of mitochondria, which were likely free-living prokaryotes.
I think the correct answer from the choices listed above is option D. The term Middle Ages is best defined by the period following the decline of the Roman Empire in Europe. This period lasted from 5th century to the 15th century. Hope this answers the question. Have a nice day.<span />
Explanation:
The pulse of the bodies raises for the first 20 seconds after sitting for a prolonged period of time and then to a standing position. It should, however, return to normal afterwards. The heartbeat of the body decreases because as you travel the blood needs to flow to the active areas and the blood flows downward from gravity, however you still need to pump blood to your brain. The rise in blood demand makes the heart pump more rapidly.
D. Muscle Cells because when our muscles are not receiving a ton of oxygen they start producing lactic acid fermentation