How do adaptations aid in natural selection?

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Presentation transcript:

How do adaptations aid in natural selection? ADAPTATION NOTES How do adaptations aid in natural selection? http://www.youtube.com/watch?v=YVvn8dpSAt0 4:20-5:20min

Adaptation Any trait that aids the chances of survival & reproduction of an organism An individual can NOT adapt to environment!! A species can adapt over time 3 types

1. Structural Adaptations Changes in the structure of organism’s body parts Ex: thorns, spines, disruptive coloration (zebra/killer whale), camouflage, mimicry

Ex. Camouflage A species blends in with environment (non-living/ abiotic) Ex. Walking stick, flounder, leaf katydid

Coral king Ex. Mimicry One species “copies” another species – visual, smell, sound Ex: King snake, hawk moth caterpillar, owl butterfly, Viceroy butterfly Viceroy monarch

2.Physiological Adaptations Changes in organism’s metabolic processes (jobs of body parts) Ex: drug resistance - bacteria, pesticide resistance - insects, poison glands, blood shunting – marine mammals, “super” kidneys - desert animals

3. Behavioral Adaptations Changes in organism’s response to environment Ex: spinning webs, danger signals, mating rituals, hibernation Can be learned behaviors (taught) or instinctual (inherited)