Term
| State the criteria that must be met for coevolution |
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Definition
- Variation exists among individual organisms that make up a population
- Some of the trait differences are heritable
- Survival and reproductive success are highly variable
- The subset of individuals that survive best and produce the most offspring is not random
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Term
| Recall and describe examples of coevolution |
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Definition
- Rough skinned newts & Common garter snakes
- Probiscis and corolla lengths
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Term
| Explain what a coevolutionary arms race is |
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Definition
| It's a reciprocal cycle of adaptive genetic exchanges within populations of two species interacting with each other (note - the interacting species act as selective agents for the other) |
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Term
| Recall information about the snake-newt examples and describe how it is an example of a coevolutionary arms race |
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Definition
We were looking at the rough skinned newt and common garter snake (ranges overlap)
Newts have aposematic coloration & bumps with toxic glands that contain TTX
Here is the pattern that we see
- Toxic newt - - -> Snake becomes more resistant
- Newt gets more toxic - - -> Snake becomes more resistant
- This repeats and repeats
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Term
| Describe how coevolution can occur between plants and pollinators |
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Definition
- Plants evolve to attract pollinators AND/OR restrict pollinators from accessing nectar (from certain species)
- Pollinators can adapt physically to have easier access to nectar/to become more efficient
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Term
| Illustrate the relationship between probiscis length and flower depth (ie. corolla length) for coevolution species |
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Definition
It is thought that the corolla lengths deepened to better protect their nectar from certain species
The pollinator species we studied has their probiscis lengthen so they could get into the corolla tube to collect nectar
The way that coevolution was made possible was through the dependent of nature of food/pollination upon each other |
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Term
| Discuss all components of the primary literature called "The Geographic Mosaic of Coevolution in a Plant-Pollinator Mutualism" by Anderson and Johnson |
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Definition
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