Naturally Selected to Survived

What do you think happens when organisms cannot adapt to changes in their environment?

• Nothing happens.

• They move to another environment.

• They risk dying out.

• They wait for the environment to change again.

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Think about the simulation we completed on the peppered moth. What was the aim of that activity?

• how natural selection changed the population of peppered moths

• how the Industrial Revolution improved the lives of workers

• how Charles Darwin devised his theory of natural selection

• how humans influence organisms via artificial selection

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Smoke given off by the factories threatened the survival of the light gray peppered moths. What evidence from the text best supports this conclusion?

• Soot is a black substance that collects on a surface that comes into contact with smoke

• When coal burns, it gives off a lot of dark-colored smoke

• Predators could see the light gray peppered moths on the black trees covered by soot and easily hunt them down.

• The trees began to blacken with soot because of all of the smoke in the air from the factories.

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What conclusion can be drawn from the change in population of light gray peppered moths and dark-colored peppered moths?

• The color change had nothing to do with the change in environment

• There were previously no dark-colored peppered moths.

• The lighter peppered moths migrated to a new environment

• Darker coloring is currently better for the peppered moth’s survival

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Read the following sentences: “In the English countryside near industrialized areas, the trees began to blacken with soot because of all of the smoke in the air from the factories. This made the light gray peppered moths much more vulnerable. Predators could see them on the trees more clearly and easily hunt them down.

”What does “vulnerable” mean?

• quick to change

• open to attack

• easily defended

• in a strong position

Choose the answer that best completes the sentence below.

___________ of the smoke given off by coal burned in the factories, the nearby trees became blackened with soot.

• On the other hand

• Primarily

• As an illustration

• As a result

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What is natural selection?

• Natural selection is the number of plants an animals in a ecosystem.

• Natural selection is the freedom to choose your own mate.

• Natural selection is the process by which species die or live through changes in their environment.

• Natural selection is when one organism prey on another.

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How did the peppered moth’s environment change, and what caused this change?

• The environment changed as the trees became green and covered with spots.

• The environment changed as the trees became black and covered in soot. This was caused by the appearance of factories that emitted smoke.

• The environment changed as the trees became pink and covered in green.

• The environment changed as the leaves fell off the trees.

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How did the peppered moth population become mostly dark-colored?

• As the light gray peppered moths were eaten by predators, the darker moths survived. These dark-colored peppered moths bred with other dark-colored peppered moths and produced dark offspring that were more likely to survive than light gray peppered moths. Over time the peppered moth population became dark-colored as the light gray peppered moths were dying out.

• The light gray peppered moths were eaten by snakes and frogs.

• The light gray peppered moths stop breeding and died out.

• The dark colored moth died out while the light colored moth became dominate.

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A grizzly bear survives because he is well-adapted to his environment. When he reproduces he passes on those traits to his offspring. this process is called

• Natural Selection

• Selective Breeding

• Random mutations

• Variations in a species

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