Evolution Flashcards
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It is the process by which organisms
have changed over time
Evolution
suggested that organisms could
change during their lifetimes by
selectively using or not using various
parts of their bodies
French naturalist, biologist, academic, and soldier
Jean-Baptiste Lamarck
Book written by Charles Darwin
On the origin of species
if more individuals are produced than can
survive, members of a population must
compete to obtain food, living space, and
other limited necessities of life
Struggle for Existence
Members of a predatory species that are faster or have longer claws or sharper teeth can catch more prey. And members of a prey species that are faster or better camouflages can avoid being caught.
Variation and Adaptation
Individuals with adaptations that are well suited to
their environment can survive and reproduce are said to have high fitness
difference in rates of survival and
reproduction
Survival of the Fittest
all species –living and extinct –are descended from ancient common ancestors
Principle of common descent
proposed by charles darwin
Evidences of Evolution?
- Biogeography
- Closely related but different
- Distant but similar
Same structure, different function
Homologous skeletal structure
Same function, different structure
Analogous skeletal structure
A remnant, impression, or
trace of an animal or plant
of a past geologic age that
has been preserved in the
earth’s crust
Fossil
Comparison between different embryos of different species
Comparative Embryology
Comparison of different body structures of different species
Comparative Anatomy
At the molecular level, the universal genetic code and homologous molecules provide evidence of common descent
Genetics and Molecular Biology
