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Activity 2

Deep History

Iibbar Kohn

BIO 345 Evolution

Summer B 2020

07 JUL 2020

Origin of the Universe

~13.8 GYA

Origin of the Universe

Cosmic Explosion creates the universe "The Big Bang Theory"

Earth Formation

~4.5 GYA

Formation of Earth

Via accretion of dust, gases, and interstellers the place we call Earth was formed

Start of life

~3.8 GYA

Start of life

  • Stromatolites- distinctive rocks

  • Scientific evidence suggest presence of microbes possibly responsible for life on earth.

Origin of Eukaryotes

~2.25 BYA

Origin

of

Eukaryotes

cells presenting internal organelles (Nucleus, Mitochondria) formed. Eukaryotes gave rise to multicellular organisms.

Origin of Multicellularity

~1.9 GYA

Origin

of

Multicellularity

  • Reproduction in a true multicellular organism involves regenerating an entire organism from germ cells (sperm, egg cells)
  • First Evidence from Cyanobacteria Organism

Oxygenation of

Earth's Atmosphere

~2.33 BYA

Oxegenation of Earths Atmospehre

Oxygen gas began to accumulate in the atmosphere due to Cyanobacteria.

Origin of Homo sapiens

~200 KYA

Origin of

Homo sapiens

Fossil evidence suggest homo sapiens evolved from Africa.

Present Time

Current Year: 2020

Present

Time

Earth in 2020 is fully functional with living people, things, and organisms having evolved tremendously since the beginning of its origin.

References

  • https://media.hhmi.org/biointeractive/click/deeptime/ (2-7)
  • https://www.nature.com/articles/nature12426 (1)

References

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