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Adaptation in species. 7th grade

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by

Raquel Martínez

on 2 October 2014

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Transcript of Adaptation in species. 7th grade

Adaptation in species.
Artificial selection
-Not selective breeding.
-Crops and animals of importance to humans.
-Selection and breeding of organisms with desired traits.
-Great example for natural selection
-short periods of time
-great changes.
Variations
-Appear thanks to sexual reproduction.
-Small changes that arise thanks to inheritance.
-Involve organisms of the same species.
-The source is a mutation.
NOT ALL MUTATIONS ARE HARMFUL
Adaptation
-What occurs when a variation is beneficial for the organism?
-An inherited trait that helps a species survive in its environment.
-Mutation-variation-extended into population
Natural selection
-How can a variation in an individual become common to all the population?
-this process helps organisms with variations adapt to their environment.
-compete better
-find and eat better
-better shelter, escape from predatos
-homeostasis
-reproduce more
-DIFERENTIAL BREEDING!
-Relative to the environment
-Leads to the formation of new species

Types of adaptations
Structural: color, shape, internal structure.
Behavioral: actions such as migration, hibernation, mating rituals, playing dead.
Functional: biochemical changes, shedding, spitting, hibernation, special digestion processes.
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