Speciation

A flash flood carried a raft of Amazon ants away from their original population. There is enough distance between the two groups, that they will never meet in nature again. What type of isolation is this?

• Behavioral isolation

• Temporal isolation

• Geographic isolation

Which of the following is NOT true in the formation of a new species?

• A mutation causes a population to breed with a different species.

• Reproductive isolation can occur by the formation of a mountain range.

• A population needs to become reproductively isolated.

• An isolated population has adapted to new ecological niches eventually result in the inability to reproduce with the original population.

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In order to be considered a true species, an organism must be…

• Naturally-occurring

• Naturally-reproducing

• Able to produce fertile offspring

You are researching reptiles and encounter two garter snakes on a hike. Both snakes are brown and white, but their patterns are slightly different. You bring them back to the lab for further study. What is the BEST way to determine if these two are the same species?

• Their appearance - if they look similar, they must be the same species

• Their adaptations - if they have the same traits, they must be the same species

• A breeding experiment - if they are able to produce offspring, they must be the same species

• DNA testing - if their DNA/genes are the same, they must be the same species

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If a population becomes isolated from other populations of the same species and then genetic differences start to occur, what happens?

• Competition

• Extinction

• Speciation

• Fossils form

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Temporal isolation is different from behaviorial isolation because, temporal isolation means...

• Organisms are not reproducing at the same time

• Organisms are physically separated

• Organisms are not attracted to the mates attraction signals

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What type of isolation has occurred in the image?

• Geographic isolation

• Temporal isolation

• Behavioral isolation

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What type of isolation has occurred in the image?

• Geographic isolation

• Temporal isolation

• Behavioral isolation

A population of fruit bats is active at night. Part of the population is most active from 8pm to midnight, and the rest of the bats eat from 1am to 5am. Eventually, the bats don't interact with each other at all. What type of isolation is this?

• Behavioral isolation

• Temporal isolation

• Geographic isolation

When the Grand Canyon in Arizona formed, two populations of one squirrel species were separated by the giant canyon. This is an example of _____________.

• Temporal isolation

• Behavioral isolation

• Geographic isolation

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