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Terms in this set (19)
The proposed idea to explain the origin of anaerobic Organelle now and a photosynthetic Organelle
Only living organisms can produce other living organisms
Theory of biogenesis
Life arises from nonlife or nonliving things
Prokaryotic cells were involved in the formation of eukaryotic cells
Francesco redi performed a controlled experiment with flies and maggots to test this Idea on the origin of life
Tell what redi observed in each flask as the meat decayed
He observed the development of flies. Maggots to flies. Adult flies lay eggs to maggots
Recall what his experiment showed
It showed that flies came only from eggs laid by other flies
Name two places on earth were organic molecules could have originated
Hydrogen gas, water vapor, meteorites
What was produced in the experiment performed by Miller and Urey? What was the significance of these findings?
Amino acid's were produce an experiment
What were the first molecules that scientists believe contained hereditary information?
What were the first cells on earth?
Anaerobic, Heterotrophic, and prokaryotes
What were the first cells similar to?
Archea (lived under extreme climates)
What do most of these cell undergo to use chemicals to make a food supply?
Many scientists believe that __________ cells evolved from forming a ___________ relationship with simpler cells
What two unique characteristics of RNA lead scientists to believe that it is life's first coding system for hereditary information?
It is Able to take on many different shapes. Also RNA can act as an enzyme.
Explain why most scientists thkng the first cells were similar to today's archea?
Because they live in extreme environments similar to the ones of early earth
Describe the endosymbiont theory
It evolved from a mutually beneficial relationship between primitive eukaryotes and the prokaryotes is engulfed
How did photosynthetic prokaryotic cells change the atmosphere of the early earth?
They evolved from archea. Cyanobacteria produced enough oxygen to support formation of an ozone layer; once ozone shield was established, conditions would be right for appearance of eukaryotic
Analyze how the ozone layer has contributed to the development of eukaryotic cells
Since the ozone layer is the Protective layer of the earth that prevents strong UV rays from penetrating enormously in the earths surface, it is possible that has generated and contributed to the formation of eukaryotic cells and cause them to propogate
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