Panspermia Theory

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Recommended: Theories on the origin of life 200 words

Allison Yi 1/19/17
AP BIO Section number 132
Theories for the Origin of Life on Earth
1. The Panspermia theory is a theory that suggests that life on Earth started due to a meteorite colliding to Earth and that life did not start on Earth. The theory explains that life was existent in space and that there was a bacteria that was able to travel in space in a meteorite.
2. A. The Chemical evolution theory states that early earth conditions were very harsh. For example, Earth was very hot and the atmosphere consisted of mostly water vapor, carbon dioxide, methane and more. However, oxygen was not in early Earth and no ozone layer was present therefore, the UV rays were …show more content…

A. The formation of eukaryotic cells and its nucleus and organelles occurred due to more complex life. The infolding of the cell membrane created the nucleus and endomembrane system. The organelles formed were the golgi bodies, vesicles, plasma membrane and the endoplasmic reticulum.
B.The organelles formed were golgi bodies, vesicles, plasma membrane and the endoplasmic reticulum and are known as the endomembrane system. The evidence for their origin is supported through the cell membrane infolding because these structures are connected together. In addition their functions depend on each other. This can be explained by the endoplasmic reticulum producing proteins or lipids. This then enters the vesicles which usually omr when secretion is happening. Next, to the golgi bodies which help secrete and help intramolecular transport. This then goes to the plasma membrane which determines which things are let in or out of the cell. From the plasma membrane, the products are let out of the cell.
5. A. The mitochondria was thought to have been an aerobic prokaryotic cell. This aerobic prokaryotic cell should be small as it is ingested by a larger host cell.
B. The chloroplasts were have thought to have been a photoautotrophic cyanobacteria. This would have to be small because it is ingested by a larger host

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