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Quest #4 :recycle: (Theory of Evolution (Charles Darwin (Came up with…
Quest #4
:recycle:
Theory of Evolution
Contrasting Idea: Unity and Diversity of Life
Unity - must have come from some original
must have changed gradually separately
Charles Darwin
Wrote, "On the Origin of Species"
Came up with theory of evolution
tortoises
different on each island
2 Inferences
Unequal reproductive stress
individuals well-suited for an environment are more likely to reproduce
Favorable traits accumulate in a population
2 Observations
Individual variation
those traits get passed from parents to offspring
individuals in a population vary by traits
Overproduction of offspring
a population can produce more offspring than the environment can support
Evolution = "gradual change over time"
Example: Sickle cell disease
Prokaryotic Cells
Bacteria & Archaea
Domain archaea = the prokaryotes we find in extreme environments
Characteristics
Cell walls
Made of peptidoglycon
can have a positive or negative gram stain
capsule
sticky layer of polysaccharides or proteins
protect from attack by host's immune system
fimbriae/ pili
hairlike appendages
aid in adhesion