Page 116 - Science Course 3 (Book 1)

Mo3-L2b: How Do Living Organisms Adapt?

Selective Breeding Key Concept
the selection and breeding of organisms for desired How Do Living Organisms Adapt?
traits.
How do variations lead adaptions?

Let’s Begin

Adaptation
Through natural selection, a helpful variation in one
individual can spread to all members of a population.
An adaptation is an inherited trait that increases an
organism’s chance of surviving and reproducing in
its environment.

Adaptations of the Polar Bear Structural adaptations
most bears do eat some plant matter, but where involve color, shape, and
polar bears live, there is almost no plant matter avail- other physical character-
able, so they have adopted to a totally carnivorous istics.
lifestyle.

Behavioral adaptations
involve the way an
organism behaves or
acts.
• Whiter fur is an obvious adaptation to the polar
bear’s life on arctic ice pack. It helps them hide in
plain slight.
Functional adaptations involve internal body
• Big furry feet, like snowshoes to help walk in the systems that affect biochemistry.
snow.

• Thick bubbler to help keep them warm.

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