Evolution Flashcards
evolution
Study of how things change over time
Theories of Evolution - Lamarck
Law of use and disuse and law of inheritance of acquired characteristics
species of finches darwin found among the different islands of the Galapagos
14
Darwins conclusions
variation in beaks, adaptation to food, natural selection for most fit
What book did Darwin publish
“The Origin of Species” - 1859 (32 years after end of voyage)
What did Darwin propose?
Theory of Evolution by Natural Selection
Several key insights led to Darwin’s idea for_
Natural Selection
Define Artificial selection (Selective breeding)
the process by which humans select traits through breeding
Define Natural selection_
explains how evolution can occur
how many principles are in the theory of natural selection
4
List the 4 main principles to the theory of natural selection
1) overproduction
2) variation; heritable differences
3) adaptation
4)Descent with Modification
Industrial Revolution in Europe during 1850s affected the natural selection on _ of the peppered moths
colors
all the gene in all individuals in a population
gene pool
random change in the DNA of a gene
mutation
results in new combinations of alleles. (crossing-over, independent assortment)
sexual reproduction
variations that improve an organisms’ chance for survival and reproduction
adaptation
when a few individuals start a new colony it most likely results in
genetic drift
What occurs when some girrafe’s in a population migrate to another area and join another pupulation
gene flow
What type of isolation occurs when the timing of reproduction is different between two populations?
temporal isolation
The human, whale, and bat forelimbs suggest a common ancestry. This is an example of ____ structure.
homologous structure
Evidence in evolution occurs in a fossil record, comparative anatomy and comparative_____
embryology
A structure that has been reduced in size because of disuse such as (human tail bone, appendix) are known as ______ structures.
vestigial
Dolphins and Sharks do not have a close ancestor however they have evolved overtime to look more and more similar because they live in the same environment. This is an example of _____ evolution
convergent
What type of natural selection eliminates the intermediate or average phenotype.
Disruptive selection
What type of structural adaptation protects an organism by COPYING the appearance or behavior of another species
mimicry
The process by which a population becomes better suited to live in its environment is known as ____
adaptation
When Darwin was checking the beak size of the finches in certain areas, he discorver that the beak sizes were getting larger in general. This is an example of ______ selection
directional
_____ structures are body parts that do not have a common evolutionary origin but are similar in function due to convergent evolution (bat wing and insect wings)
analogous
Natural selection is _____ and _____ of organisms that are best adapted to the environment.
survival, reproduction
when an organism blends into its environment, it is called _____-.
camouflage
The evolution of hummingbirds’ beak and plants with deep tubes in their flowers is an example of ______.
coevolution