Bio 101: Evolution – Study Guide & Revision Notes
Evolution: - correct answer ✔✔Genetic change in a population or species over time.
What is the evolutionary unit? - correct answer ✔✔Populations.
Gene pool: - correct answer ✔✔All the alleles of a population.
Population: - correct answer ✔✔All members of a species that live in a defined area.
What did Darwin observe to help create his theory of evolution and natural selection? - correct
answer ✔✔--The diversity of life
--Patterns of similarity
--Organisms suited to their environment
What is the evidence we have to support evolution? - correct answer ✔✔The fossil records, Bio-
geography, comparative anatomy, comparative embryology, and molecular biology.
How do the fossil records support evolution? - correct answer ✔✔Transitional fossils show
similarities in organisms new and old connecting them to the same ancestors.
How does bio-geography support evolution? - correct answer ✔✔Bio-geography shows us the
geographic distribution of species making it possible to relate species to a common ancestor
based on location.
How does comparative anatomy support evolution? - correct answer ✔✔--Biologists use
vestigial structures to connect species to their ancestors.
--Finding species with similar anatomy helps connect them with each other.
, Vestigial structure: - correct answer ✔✔Remnants of features that served important functions
to an organisms ancestors but have nearly disappeared due to evolutionary change when the
organisms no longer requires that function for survival. (ex: whales have bones near the end of
their body resembling those of a hip bone suggesting they originated from a four legged land
animal.)
How does comparative embryology support evolution? - correct answer ✔✔Similar embryo
shapes suggest we all started off the same.
How does molecular biology support evolution? - correct answer ✔✔Shows the similarity in
DNA sequences between different species use to prove relations.
Natural selection: - correct answer ✔✔Within a population some individuals may have
variations that give them an advantage at survival, these will be the individuals with the best
chance of survival and will likely pass these variations to their offspring and so on.
Micro-evolution: - correct answer ✔✔--Evolution at its smallest scale.
--Changes in allele frequency in a population.
Macro-evolution - correct answer ✔✔Changes going above the level of species.
Mechanisms of Micro-evolution: - correct answer ✔✔Genetic drift, mutations, gene flow,
natural selection.
Genetic drift: - correct answer ✔✔Evolution of a population due to chance events. More
effective on small populations.
Evolution: - correct answer ✔✔Genetic change in a population or species over time.
What is the evolutionary unit? - correct answer ✔✔Populations.
Gene pool: - correct answer ✔✔All the alleles of a population.
Population: - correct answer ✔✔All members of a species that live in a defined area.
What did Darwin observe to help create his theory of evolution and natural selection? - correct
answer ✔✔--The diversity of life
--Patterns of similarity
--Organisms suited to their environment
What is the evidence we have to support evolution? - correct answer ✔✔The fossil records, Bio-
geography, comparative anatomy, comparative embryology, and molecular biology.
How do the fossil records support evolution? - correct answer ✔✔Transitional fossils show
similarities in organisms new and old connecting them to the same ancestors.
How does bio-geography support evolution? - correct answer ✔✔Bio-geography shows us the
geographic distribution of species making it possible to relate species to a common ancestor
based on location.
How does comparative anatomy support evolution? - correct answer ✔✔--Biologists use
vestigial structures to connect species to their ancestors.
--Finding species with similar anatomy helps connect them with each other.
, Vestigial structure: - correct answer ✔✔Remnants of features that served important functions
to an organisms ancestors but have nearly disappeared due to evolutionary change when the
organisms no longer requires that function for survival. (ex: whales have bones near the end of
their body resembling those of a hip bone suggesting they originated from a four legged land
animal.)
How does comparative embryology support evolution? - correct answer ✔✔Similar embryo
shapes suggest we all started off the same.
How does molecular biology support evolution? - correct answer ✔✔Shows the similarity in
DNA sequences between different species use to prove relations.
Natural selection: - correct answer ✔✔Within a population some individuals may have
variations that give them an advantage at survival, these will be the individuals with the best
chance of survival and will likely pass these variations to their offspring and so on.
Micro-evolution: - correct answer ✔✔--Evolution at its smallest scale.
--Changes in allele frequency in a population.
Macro-evolution - correct answer ✔✔Changes going above the level of species.
Mechanisms of Micro-evolution: - correct answer ✔✔Genetic drift, mutations, gene flow,
natural selection.
Genetic drift: - correct answer ✔✔Evolution of a population due to chance events. More
effective on small populations.
