bioTest_3_notes

bioTest_3_notes - April 19, 2010 Co-evolution example: o A...

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April 19, 2010 Co-evolution example: o A species of butterfly matures into female adults but doesn’t have viable eggs They don’t feed enough as larva because they are easy for predators to eat them so they become adults sooner to be able to fly and get away. they go to vines to feed on their pollen the plant provides pollen to the butterfly The pollen grain is especially for this butterfly because it is larger and easy for them to collect. They produce flowers for a while (about 6 weeks) and the butterfly go back to them day after day. Once the butterfly has been “trained” to come to the flower the plant produces a female flowers and the butterfly pollinates them. then the plant goes back to male flowers Very tight co-evolution. they both depend on each other and need each other for reproduction Plant defenses o cuticle makes it hard for insects to chew through and fungi to grow o tough leaves Once the leaves grow to their full size the water goes away and makes it harder to chew through very common defense o hormones many ferns mess with the growth hormones of the insects o toxins kills the predator o enzyme interference Produces compounds that interfere with the digestive enzymes Interferes with their development and increases the time they are small and exposed to predators.
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This note was uploaded on 01/26/2012 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.

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bioTest_3_notes - April 19, 2010 Co-evolution example: o A...

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