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44 Cards in this Set

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Evolution
the process by which populations change over time in response to changes in the enviroment
POpulation
smallest ecologial levels in which evoultion can take place
The process by which modern organisms have decended from ancient organisms is called___________.
Evolution
True or False
Chalres Darwin contributed more to our understanding of evolution than everyone else.
True
Differences among indiviuduals of a species are referred to as
variation
fitness
the ability to reproduce and surive
adaption
any inherited characteristic that increases an organism's chance of surivial
natural selection
survival of the fittest
What does the pharse struggle for existence mean?
that members of each species complete reguardy to obtain food,living space, and other nessicaries of life.
Is the following sentence true or false Adaptations can be physical characteristics but not more complex features such as behavior
True
Explain what Darwin meant by the pharse surival of the fittest
That the weaker animals are not going to surrive as long or well as the stronger animals.
What is true of Natural Selection?
a.)It selects traits that increase fitness
b.)It takes place without human control
c.)It can be observed directly in nature
d.)It leads to an increase in a species' fitness.
a and b
The princle that living species descend, with changes, from other species over time is referred to as________.
descent with modificaon
The principle that all species derived from a common ancestor is know as_____.
common decent
True or False
Darwin argued that living things have been evolving on Earth for thousand of years.
True
Evolution
the process by which populations change over time in response to changes in the enviroment
POpulation
smallest ecologial levels in which evoultion can take place
The process by which modern organisms have decended from ancient organisms is called___________.
Evolution
True or False
Chalres Darwin contributed more to our understanding of evolution than everyone else.
True
Differences among indiviuduals of a species are referred to as
variation
fitness
the ability to reproduce and surive
adaption
any inherited characteristic that increases an organism's chance of surivial
natural selection
survival of the fittest
What does the pharse struggle for existence mean?
that members of each species complete reguardy to obtain food,living space, and other nessicaries of life.
Is the following sentence true or false Adaptations can be physical characteristics but not more complex features such as behavior
True
Explain what Darwin meant by the pharse surival of the fittest
That the weaker animals are not going to surrive as long or well as the stronger animals.
What is true of Natural Selection?
a.)It selects traits that increase fitness
b.)It takes place without human control
c.)It can be observed directly in nature
d.)It leads to an increase in a species' fitness.
a and b
The princle that living species descend, with changes, from other species over time is referred to as________.
descent with modificaon
The principle that all species derived from a common ancestor is know as_____.
common decent
True or False
Darwin argued that living things have been evolving on Earth for thousand of years.
True
Edidence for evoution
Fossial record, biochemical simulatities,Ebromalogy,and Compritive Anaomly structures
How do fossials that formed in differnt rock layer provide evidence of evolution?
The prove that there is evoultion thought the years by the organisms fossicals changing.
What happened to finiches?
The descended with modications from a common mainland ancestor.
How did Darwin explain the existence of similar but unrealated species?
Geographic Distribution of living species
Structures that have a different mature forms but devolp from the same embryotic tissuies are called __________.
homolougus sturctures
True or False
Homologous structure provide strong evidence that all four-limbed vertabrates have decended,with modifications,from common ancestors.____________
analogous sturctures
Organs that are so reduced in size that they a just vestigles, or traces, of homogous organ in other species are called _______.
vestigial organs
A group of indiviuals of the same species that interbreed is a __________.
species
All of the genes in a population are called a
gene pool
Sources of the Genetic Variation
Mutations and Gene Shuffling
What is a mutation?
is any change in a sequance of DNA.
Why do mutations occur?
a protein is either earsed,changed or added.
What does mean for two species to evolve?
Populations become reproductively isolated
what must happen in order for new species to evolve?
isolating