Intro to Bio 1.2 Evolution of Cellular Life

Kepler-22, The first exoplanet discovered by Kepler to orbit in a star's habitable zone

TOI-4600c

1) Atoms formed
2) Atom scombined to make precursor molecules
3) Precursors form into macromolecules (RNA) and/or structures (membranes)
4) Primitive RNAs develop replicase and catalytic activities
5) Protocells form by primitive membranes enclosing RNAs and other macromolecules

- Life is the ULTIMATE emergent property.
- Arose as a continuous sequence of emergent events, each the inevitable consequence of interactions amongst carbon-based molecules
- Universe may be organized such that life spontaneously emerges given appropriate conditions and sufficient time

- One of the most important books in biology
- Laid foundations for molecular bioogy and understanding of DNA and the gene.
- Life could be understood in terms of the laws of physics and chemistry
- To maintain itself and escape the inevitable dissolution demanded by the 2nd law of thermodynamics, life constantly takes in energy from enviorment.
- "Living matter evades decay to thermodynamic equilibrium by having a metabolism."
- Dawkin's "The Selfish Gene"

1) Growth
2) Response
3) Heredity
4) Homeostasis
5) Metabolism
6) Reproduce
7) Order

increase size of parts not just accumalte matter

react to envionmental stimuli

Ability to evolve traits over time

regulate the internal state

convertse energy to perform function

capable of producing new organisms from the parent

generally characterized by ordered structures

Carsonella ruddi
- 182 genes
- obligate endosymbionts with aphids

FALSE

TRUE

TRUE