A frog combining glucose with urine to make antifreeze in its bloodstream so that it can survive the winter.

The dark peppered moth population increased during the industrial revolution because the soot-covered forests favored the dark moth. This is an example of how...

Variations are important in populations because they can lead to...

Physical (structural) adaptations...

Behavioral adaptations...

Adaptations in a species over time are caused by...

Variation is to difference; as Mutation is to...

What variations did Darwin observe about the finches on the Galapagos Island?

There is variation within species. Individuals with traits most favorable for a specific environment are more likely to survive and pass on these traits to offspring. This statement is best described by?

Some kinds of fish live most of their lives in salt water but lay their eggs in freshwater. Their ability to survive in different environments is an example of ____________.

An organism is born with a genetic variation not present in any of its ancestors. This variation is most likely the result of ____________.

When the environment changes more quickly than a species can adapt, the species may become?

Sea turtles lay many more eggs than what will survive. A large number of the young turtles will be eaten by predators and only a few will survive.

Snakes share the need for similar food sources, habitats, territories, and mates. There are often not enough of these resources for all the snakes to survive..

Over time, sand on the shores where the turtles lay their eggs has darkened. The environment is more favorable to the dark colored turtles so the darker colored turtle population increases while the lighter turtle population decreases.

Each individual turtle is born with slightly different traits. For example, some turtles may be faster swimmers, have different markings on their shells and have broader flippers.

The gray whale migrates 10,000 km from Alaska to Mexico to give birth each year.

Eagles have keen eyesight, sharp talons (claws) and sharp hooked beak for hunting prey.

The male moose tilts his head back so antlers lay flat on his back when running through dense woods so that they do not get caught in the branches.

A jackrabbit's ears have blood vessels that dilate to allow the blood to cool before cycling the blood back to the body. This helps keep the jackrabbit cooler in their habitat.

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