Test 3 - Topic 13-14 Flashcards
_________ : group of interbreeding natural populations that are reproductively isolated from other natural populations
species
_________ - A specific evolutionary pattern where there is a rapid increase in the number of closely related species
Adaptive Radiation
Adaptive Radiation - A specific evolutionary pattern where there is a rapid _________ in the number of closely related _________
- increase
- species
_________ - An evolutionary pattern where very different organisms show similar characteristics
Convergent Evolution
Convergent Evolution - An evolutionary pattern where very different _________ show similar _________
- organisms
- characteristics
_________ - An evolutionary pattern where individual events cause many branches in the evolution of a group of organisms
Divergent Evolution
Divergent Evolution - An evolutionary pattern where _________ events cause many branches in the evolution of a group of _________
- individual
- organisms
_________ : is the process by which local units of a population become reproductively isolated from other units and thus experience changes in gene frequencies
Genetic divergence
Genetic divergence is the process by which local units of a _________ become reproductively isolated from other units and thus experience changes in _________ frequencies
- population
- gene
_________ - reinforce genetic divergence by stopping gene flow (cant move from flint to lansing - something is blocking them)
Isolating mechanisms
Isolating mechanisms - reinforce _________ divergence by _________ gene flow (cant move from flint to lansing - something is blocking them)
- genetic
- stopping
_________ Isolation - Isolation mechanisms that take place before the zygote is formed
Pre-zygotic
_________ Isolation - They have different times of reproduction
Temporal
_________ Isolation - Refers to the different patterns of courtship
Behavioral
_________ Isolation - Reproductive organs prevent successful breeding (chiwawa and great dane)
Mechanical
_________ Isolation - Egg and sperm can not fuse together
Gametic
_________ Isolation - A physical barrier prevents mating
Geographical
_________ Isolation - Takes place after the zygote is formed
Postzygotic
A _________ is produced -
- One hybrid is weak sickly, and dies shortly after birth
- One hybrid is strong and healthy but sterile
hybrid
A hybrid is produced -
- One hybrid is _________ sickly, and dies shortly after birth
- One hybrid is _________ and healthy but sterile
- weak
- strong
_________ Speciation - Takes place in the absence of gene flow
(the isolating mechanism is Geographical)
(Allopatric = Different homeland) (physical barrier)
Allopatric
Allopatric Speciation - Takes place in the absence of gene flow
(the isolating mechanism is _________ )
(Allopatric = Different _________ ) (physical barrier)
- Geographical
- homeland
_________ Speciation - New species arise, sometimes rapidly from a small proportion of individuals within the existing population (Sympatric = Same homeland)
Sympatric
Sympatric Speciation - New species arise, sometimes rapidly from a small proportion of _________ within the existing population (Sympatric = Same _________ )
- individuals
- homeland
_________ - Have more than two chromosomes per trait -
(Is considered isolation and instant speciation)
[This instant speciation can only happen in plants]
Polyploidy
Polyploidy - Have more than two chromosomes per trait -
(Is considered _________ and instant speciation)
[This instant speciation can only happen in _________ ]
- isolation
- plants
_________ Speciation - New species form from a small proportion of individuals along a common border between two populations
(Usually competing for food) - (Parapatric = Near another homeland)
-Gene flow may not be stopped
Parapatric
Parapatric Speciation - New species form from a small proportion of individuals along a common border between two _________
(Usually competing for food) - (Parapatric = _________ another homeland)
-Gene flow may not be stopped
- populations
- Near
-Patterns of Speciation-
_________ - (Branched Speciation)
Cladogenesis
-Patterns of Speciation-
Cladogenesis (Branched _________ )
Speciation
-Patterns of Speciation-
_________ - (Unbranched Speciation)
Anagenesis
-Patterns of Speciation-
Anagenesis (Unbranched _________ )
Speciation
-Rate of Speciation-
_________ - (Darwin) - Changes take place very slowly over generations of time
Gradualism
-Rate of Speciation-
_________ - (Gould) - There are periods of rapid speciation where many species evolve followed by time periods with little speciation
Punctuated Equilibrium
-Rate of Speciation-
Punctuated Equilibrium - (Gould) - There are periods of rapid _________ where many species evolve followed by _________ periods with little speciation
- speciation
- time
-Rate of Speciation-
_________ - When an entire species dies off
Extinction
-Rate of Speciation-
_________ Extinction - Rather inevitable loss of species as local conditions change over time
Background
-Rate of Speciation-
_________ Extinction - An abrupt disappearance of many species due to catastrophic global events
Mass
_________ - The study of relationships between organisms and their environment
Ecology
_________ - Anything that affects and organism during its lifetime
Environment
_________ - A complex of organisms interacting with one another and with their physical environment
Ecosystem