Evolution In Populations Review Flashcards
What is natural selection
The differential survival and reproduction of individuals that have higher fitness to their environment
What is the definitions of a population
A group of the same species that live in the same place at the same time
What is the unit of evolution?
Populations
How do populations change over time?
The allele trait frequencies within the population change over time
What are some of the lines of evidence for evolution and what do they show?
The fossil records show the age of different species and immediate forms
Is the fossil record complete? Why or why not? How are they arranged?
No, somethings are preserved better and location (ie. tropical forests)
What is biogeography? How does it show evolutionary history?
Closely related species tend to occur in nearby areas
What is homology?
Similarity due to shared ancestry such as the bone structure of fire limbs of humans, bats, and dolphins
What does comparative anatomy show about evolutionary history?
Similarity of structure among related species
What are vestigial structures?
Structures that are still present that no longer serve a purpose
What is comparative embryology?
Comparing development between species to identify similarities between a shared ancestry
What are the two key observations underlying the theory of natural selection?
All organisms produce more offspring than the environment can contain “survival of the fittest”
Why does differential reproductive success lead to evolution?
Individuals that are more fit to their environment produce more offspring
What are some examples of evolution in action?
Antibiotic resistance, pesticide resistance in weeds
What is the definition of a population
A group of individuals of the same species in the same place at the same time, potentially or actively breeding
