Exam 1 Flashcards
What is Evolution?
Change overtime
Organic Evolution
inherited change in the properties of groups of organisms over the course of generations
What is another word for “organic evolution”?
descent with modifiaction
What are populations?
groups of comspecific organisms that occupy a defined geographic region and have reproductive continuity from generation to generation
what are conspecific organisms?
individuals or populations that belong to the same species
What are Lineages?
series of ancestral and descendant populations through time
What is DIvergence?
evolution of incresing differences between lineages
What is a hypothesis?
informed conjecture of what might be true
What is a scientific Theory?
comprehensive and coherent, based on reasoning and evidence, that explain some aspect of nature
Example of a scientific Theory
Gravity ! !
Does correlation = causation?
NO
What is an ultimate cause?
deeper reason why events occur, behvaiors encoded by genes that are inheritable (evolutionary)
what are proximate causes responsible for?
directly responsible to events, the reason it occurs
organismal lineages __________
change over generations
evolution leads to _____________
diversification of lineages
All known organisms share ___________
common descent
________ is necessary for evolutionary change
variation
_________ gives rise to variation
genetic differences
change is caused by _____ and _________
deterministic and random processes
evolutionary processes depend on ________
propeties of organisms
__________ are __________
rates of change are heterogeneous
What is meant by rates of change are heterogeneous?
traits do not evolve at similar rates
What are deterministic processes?
not random. like natural selection
What are random processes?
mutation and historical contigency
