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Adaptation: Part 6 Feature vs Trait

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by

Dan Covey

on 4 December 2012

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Transcript of Adaptation: Part 6 Feature vs Trait

Adaptation: Features vs Traits Let’s take a look back at the quick write labeled Adaptation that you did at the beginning of this unit.

On the same sheet I would like you to think about the definition you gave and try to correct yourself without the use of any other work.

PLEASE, don’t erase. Write the definition and some comments on how you were incorrect the first time.

Put this into the classwork section of your notebook when you are done. Adaptation
Survival and Reproduction. Let’s practice.

All rose bushes have flowers. Flowers are a feature of roses. Some rose flowers have the trait of. . . Adaptation
Survival and Reproduction. All walkingsticks have long legs, but some have little bumps on their legs, and some have smooth legs. Each is a trait of some walkingsticks. All walkingsticks have color, but some are more greenish and some are more brownish. Each specific color is a trait.

There is variation in most features of organisms, and the different ways individual organisms express their features are called traits.

What is one feature of a human being? What traits are there for that feature? Adaptation
Survival and Reproduction. General structures, characteristics, and behaviors are known as organism features.

Legs are features, color is a feature, and resting among twigs is a feature

Specific examples of features are called traits. Adaptation
Survival and Reproduction. The walkingstick and the octopus both use protective coloration to deceive predators. But, the two organisms are different in one important way. How are the two different? Adaptation
Survival and Reproduction. Vocab:
Variation- When there are several traits for the same feature in a population.

With the walkingsticks we saw color variation ranging from green to brown. Adaptation
Survival and Reproduction. So, even though the population had even numbers of walkingsticks with each of the three different color traits, the ending population didn’t.
Why not? Adaptation
Survival and Reproduction. Let’s go back to our graphs for the walkingsticks.

What happened to the relative frequency of the different colors of walkingsticks in the different environments? Adaptation
Survival and Reproduction. Vocab:

Feature- Any general structure, characteristic or behavior of an organism. Things such as wings, fur, pattern, color, and migration can be features of an organism. Adaptation
Survival and Reproduction. Please complete the first 5 on the same sheet of paper. Use a complete sentence. Summarize in one sentence what we learned from the walkingstick predation model we worked with on the computers. First 5 What about dogs? Who can come up with one for apples? All Atlantic lobsters have a shell. A shell is a feature of Atlantic lobsters. The shell on some lobsters has the trait of. . . All black bears have fur. Fur is a feature of black bears. The fur on some black bears has the trait of. . . Trait- The specific expression of a feature in an individual. Things such as wing length, density of fur, number of spots, intensity of color, or timing of migration can be traits in individual organisms. Which color trait is poorly adapted for survival in the three different environments? Which color trait is best adapted for survival in the three different environments? How do the end populations compare to the starting populations? How can a trait be an advantage sometimes and a disadvantage at other times? So, what does variation do for a population in terms of adaptation? What would happen to the walkingstick population if there was no variation in color? Let’s say that the entire population was only brown. What would happen in the three different environments? Let’s think about humans. The most significant adaptation of humans is the flexible, logical mind. Using this adaptation, humans can modify and control their environment, making it possible to survive in a huge variety of environments. This may look like the ability of a human to change a characteristic during its lifetime, but in fact is simply using the ability with which he or she was born. What is the adaptation that helps each organism survive? http://en.wikipedia.org/wiki/American_black_bear http://en.wikipedia.org/wiki/American_lobster
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