Speciation Through Reproductive Isolation

• The image shows analogous structures that can be compared to show speciation.

• The image shows convergent evolution that represents the speciation of Darwin's Finches.

• The image shows that Darwin's Finch's demonstrates the Founder Effect through adaptive radiation, geographical reproductive isolation where natural selection caused speciation.

• The image shows organisms that are not closely related.

Common baboons live on the savanna in breeding groups called troops. While females tend to stay with the troop, younger or less dominant males may leave to join a neighboring troop.

The movement of baboons to different breeding groups is an example of _________ _________ that ___________ the genetic diversity of each population.

• Gene Flow : Increases

• Gene Pool: Increases

• Gene Flow: Decrease

• Gene Pool: Decreases

A population of chimpanzees was separated when the forest that they lived in had a section cut down and a town was built. After a long period of time, the chimpanzees came back into contact but were incapable of breeding. Which of the following best describes the process that occurred?

• adaptation
• speciation
• convergent selection
• stabilizing selection

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Which of the following must occur for speciation to happen?

• geographic isolation

• adaptive radiation isolation

• temporal isolation

• behavioral isolation

Gentoo penguins will present a mate with a pebble that they find to attract a mate. Emperor penguins have a specific call and movement that they make to attract a mate. Which type of isolation do these penguins demonstrate?

• temporal isolation 
• behavioral isolation
• geographical isolation
• anatomical isolation

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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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. 

Tags

NGSS.MS-LS4-2

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In the Great Lakes region of North America, gray wolves and coyotes are similar species but do not mate because their breeding periods occur at different times of the year.

• Geographic isolation

• Behavioral isolation

• Temporal isolation

The females of two species of fruit fly, Drosophila melanogaster and Drosophila simulans release slightly different mating hormones called pheromones, which are used to attract male mates.

• Geographic isolation

• Behavioral isolation

• Temporal isolation

Tags

NGSS.HS-LS4-5

A type of isolation in which two populations become separated by a physical barrier such as a canyon, river, lake, preventing the two populations from interbreeding.

• Geographic isolation

• Behavioral isolation

• Temporal isolation