ET & Classification of Life

ET & Classification of Life - - First appearance of eye...

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The case for extra-terrestrial life (intelligence) - Other planets made out of similar things because when stars explode, they form the same elements, so there are likely planets that are like earth where something can evolve. - Pure oxygen is poisonous, if we breath for more than an hour. - Biosynthesis has led to a life form almost certainly, somewhere. - Stanley Miller Spark Chamber produced Amino Acid, showed biosynthesis, not life yet though. - “What are the four theories of the origin of life?” – Potential essay question Classification of Life - Kingdom, Phylum, Class, Order, Family, Genus, Species - Kingdoms - About 30 million species altogether - Horizontal gene transfer. Two genes can transfer genes. - 5,000 generations of humans - 98% of life lives in the ocean, but only (1/8) of the species - Not multi-cellular, they just divide Diatoms- Green, chloroplast Sponges- No nervous system, take in oxygen, but there is no system.
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Unformatted text preview: - First appearance of eye is only a pigment spot.- Feeding system, food comes in. Swims around, comes down, and forms into a coral.- Zooxanthellae, photosynthesize, and make food for themselves. Plant animal and mineral all in one.- Flatworms. Hermaphrodites have both male and female sexual organs. Cells have plasticity, tear it off, it grows back. - Tape worms, not flat worms, are inside humans.- Round worms, have more complex systems. Mollusca have all the systems. Cephalopod means head foot. Octopus and Squid have really big eyes Arthropods, joint head and foot- Eye is most complex- No insects in the ocean. 10 million insects Number of species in Hawaii, 700 species of flies in Hawaii. Speciate because thy live in confined valleys, separate species of flies. Sharks havent changed their shape because they are perfectly adapted to their environment. They can withstand big changes because of their general ecology....
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