*Unit 7 Part 4: Origins of Life

Question 1

Spontaneous generation

Answer 1

Life arises from non-life

Question 2

The idea that maggots came from rotting meat is an example of _____.

Answer 2

spontaneous generation

Question 3

Francesco Redi’s experiment-

Answer 3

~1668
~Put meat is sealed flasks and open flasks
~Only the meant in the open flasks had maggots and flies
~The sealed meat did not generate them
~Proves life cannot come from something non-living

Question 4

Who disproved the theory of spontaneous generation?

Answer 4

Francesco Redi

Question 5

Biogenesis

Answer 5

One living organisms can produce other organisms

Question 6

Louis Pasteur’s experiment-

Answer 6

~Late 1800’s
~Sterile broth remained free of microorganisms until is was exposed to air

Question 7

Miller and Urey experiment-

Answer 7

~1953
~Simple organic molecules could be made into inorganic compounds
~Filled apparatus with water and glasses that are assumed to havemade up the early atmosphere
~Water was boiled and electric discharges were used to simulate lightning
~The resulting mixture contained organic compounds, including amino acids

Question 8

The first cells were most likely _____ cells.

Answer 8

prokaryotic

Question 9

Prokaryotes can survive in…

Answer 9

extreme conditions

Question 10

Cyanbacteria

Answer 10

~Thought to be the first cells to produce enough oxygen to support the formation of the ozone layer
~Performed photosynthesis
~Produced oxygen