Know characteristic of early earth

  • Know characteristic of early earth
    • Formed 4.6 Billion years ago
    • Volcanic activity gases like methionine and carbon monoxide, no water but water vapor.
    • Astrioides brought water. Meterios brought heavy water.
    • Early earth had contained ammonia, methane, water vapor, and carbon dioxide but only a trace of oxygen.
    • Earth created by gas and rock.
    • The atmosphere was formed then the oceans were formed
  • What organisms produced oxygen
    • Cynobacteria
  • Approx. When did the earth form?
    • Formed 4.6 billion years ago
  • What is a fossil, where are older fossils found? What do fossils show evidence of?
    • A fossil is preserved remains of a once living organism
    • Fossil shows evolution occured
    • In Charles Darwin's book Origin of species, he gave evidence using fossils to prove that evolution had occurred.
    • Fossils are a gateway into the past.
  • Who influenced charles darwin
    • geologist Charles Lyell’s theory of gradualism (uniformitarianism), Thomas Malthus’s work on population growth, and early evolutionary ideas from Jean-Baptiste Lamarck.
  • What did stanley miller and harold urey show in there experiment
    • organic molecules, specifically amino acids (the building blocks of proteins), could form spontaneously from inorganic precursors under conditions simulating the early Earth's atmosphere.
  • What were the first organisms on earth
    • Aerobic Prokaryotes

What is the endosymbiotic theory?

Eukaryotic cells originated when prokaryotic organisms were engulfed by a host cell

  • What is the significance of the fossil record
    • To show what went extinct and show that there was evolution and how things changed over time.
  • Who was Darwin?
    • Sailed on the voyage of beagle
    • Used fossils to prove evolution. Wrote the On The Origin Of Species
  • What is natural selection
    • Natural selection is when one organism survives due to having a superior phenotype.
  • What is some support for evolution?
    • Homologus: physical features in different organisms that share a common evolutionary ancestor, even if they serve different functions
    • Vestigial structure A vestigial structure is a physical feature, organ, or behavior in an organism that has lost most or all of its original ancestral function through evolution.
    • Analogous structure; Analogous structures are biological features in different species that share the same function but evolved independently rather than from a common ancestor.
    • Fossil record
    • Dna and molecular evidence
    • Embryology
  • How do organisms adapt to their environment?
    • Organisms that have favorable traits survive the longest and reproduce compared to the ones who die do to unfavorable traits.
  • What does survival of the fittest mean?
    • It means the organisms with favorable traits will survive over the ones without favorable traits.