Speciation

What is a species?

• A group of organisms that can mate with each other and produce fertile offspring. 
• A group of organisms that genetically are very different from each other. 
• A group of organisms that can mate and produce offspring even if those offspring are infertile.
• Indivual organisms that live in the same environment. 

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NGSS.MS-LS4-4

NGSS.MS-LS3-2

What is speciation?

• The change from one species into two or more distinct species. 
• The movement of a group of organisms into a new area. 
• The ability to mate and reproduce.
• The death of an entire species. 

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NGSS.MS-LS4-4

NGSS.MS-LS4-2

What type of speciation involves isolation due to differences in mating rituals?

• geologic isolation

• behavioral isolation

• temporal isolation

Which type of isolation occurred when a few finches were blown from the coast of South America to the Galapagos Islands and then evolved into 14 different finch species?

• geographical isolation

• behavioral isolation

• temporal isolation

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NGSS.HS-LS4-4

NGSS.HS-LS4-2

Which type of speciation occurred when finches living in different habitats on the same island in the Galapagos stopped mating with each other because they were unable to understand each other's songs?

• geographical isolation

• behavioral isolation

• temporal isolation

What type of islation occurs when species no longer breed because they mate at different times?

• temporal isolation

• geographical isolation

• behavioral isolation

Some female peacocks prefer males with large, colorful tales while other female peacocks prefer males with no tail at all. Females are now mating only with the tail they prefer. What type of reproductive barrier is this?

• behavioral isolation

• geographical

• temporal isolation

Which is an example of temporal isolation?

• flowers that bloom in different months 
• birds that have different mating calls
• fruit flies that mate in different locations
• squirrels that have different fur colors

When has speciation occurred?

• When populations no longer look the same
• When populations no longer have the same frequency of alleles
• When populations are living in different environments
• When populations can no longer interbreed

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-2

A small group of finches was blown by a storm from Ecuador to the Galapagos Islands. This is an example of which cause of evolution?

• small population

• mutations

• natural selection

• movement (gene flow)

• nonrandom mating (sexual selection)