Ch 25
origin of life on earth
origin of life on earth
earliest fossils are __ years old
conditions of early earth favored
hypothesized that organic compounds could arise
spontaneously on the early Earth (no oxygen to oxidize).
test the hypothesis in a simulated laboratory environment. Formed
small organic compounds (amino acids) spontaneously. It is possible!
aggregation of polymers into protobionts
catalytic, self replicating
probably the first genetic material
later followed since it's more stable than the first genetic material
possible template for protein production
__ came after __ because oxygen became abundant in the atmosphere (about 2.1 bil years ago)
eukaryotic cells were formed by 2 methods:
__ formed from cyanobacteria and mitochondria from
heterotrophic aerobes. Initially symbiotic, developed into one organism.
Mitochondria and chloroplasts:
the evolutionary history of a species
__ similarity due to shared ancestry (__).
mammilian forelimbs
__ is similarity due to __
wings on birds and insects
compare amino acid sequence of common proteins
-objective and quantitative
-comparisons of distantly related species
compare similarities in genome
-most direct method
-can analyze fossil dna
divide of cellular life forms into archaea, bacteria, and eukaryote
monera (bacteria)
gallery>written defining characteristics of each phylum from review session with ingersoll
HEEEE :D
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Flashcards
earliest fossils are __ years old
conditions of early earth favored
hypothesized that organic compounds could arise
spontaneously on the early Earth (no oxygen to oxidize).
test the hypothesis in a simulated laboratory environment. Formed
small organic compounds (amino acids) spontaneously. It is possible!
aggregation of polymers into protobionts
catalytic, self replicating
probably the first genetic material
later followed since it's more stable than the first genetic material
possible template for protein production
__ came after __ because oxygen became abundant in the atmosphere (about 2.1 bil years ago)
eukaryotic cells were formed by 2 methods:
__ formed from cyanobacteria and mitochondria from
heterotrophic aerobes. Initially symbiotic, developed into one organism.
Mitochondria and chloroplasts:
the evolutionary history of a species
__ similarity due to shared ancestry (__).
mammilian forelimbs
__ is similarity due to __
wings on birds and insects
compare amino acid sequence of common proteins
-objective and quantitative
-comparisons of distantly related species
compare similarities in genome
-most direct method
-can analyze fossil dna
divide of cellular life forms into archaea, bacteria, and eukaryote
monera (bacteria)
gallery>written defining characteristics of each phylum from review session with ingersoll
HEEEE :D
