ch 17.3 Natural Selection review

Evolution is a change in a species over time.

• true

• false

More organisms are born than an ecosystem can support is ___

• survival of the fittest

• variations in a species

• struggle for existance

• common descent / ancestor

Individual organisms different - have different versions of a trait.

• survival of the fittest

• variations in a species

• struggle for existance

• common descent / ancestor

Individuals best suited to their environment live longer and reproduce more

• survival of the fittest

• variations in a species

• struggle for existance

• common descent / ancestor

Species alive today are descended with modifications from ancestral species that lived in the distant past

• survival of the fittest

• variations in a species

• struggle for existance

• common descent / ancestor

Individuals with fitness are selected as mates to pass down adaptations to their offspring

• survival of the fittest

• variations in a species

• natural selection

• common descent / ancestor

Match the following

• speciation

• farmer choosing which plants / animals to breed

• natural selection

• variation in a species that gives one an advantage

• artificial selection

• species dying out

• extinction

• formation of new species

• adaptation

• organisms choosing mates based on a trait

When species and traits changed over a long period of time

• descent with modification

• natural selection

• variation

• struggle for existance

Match the following

• natural selection

• Green grasshoppers live longer as they have natural camouflage

• variations

• Green grasshoppers are chosen as mates passing their camouflage adaptation to offspring

• descent with modification

• Over time the yellow grasshoppers become a separate species from the green

• fitness

• Yellow and green grasshoppers are found in a population

An ancient species that other species evolved from is a ​ ​ ​ (a)  

• artificial selection
• common ancestor
• adaptation