How did Otis get the T2 gene?

Otis inherited one copy of the T2 gene from one parent, and one copy of the T2 gene from the other parent.

Otis inherited both copies of the T2 gene from his father.

Otis developed the T2 gene as an adaptive trait in order to survive in the environment.

Otis inherited both copies of the T2 gene when he reproduced with Ruby.

Choose the best description of the distribution of fur traits in this population:

Most ostrilopes have low to medium amounts of fur, while very few have high amounts of fur.

All ostrilopes have high amounts of fur.

There is no variation of fur traits in this population

There is a high amount of variation in this population

The blue shaded bars show the distribution of fur traits in the ostrilope population today, and the gray bars show the distribution of traits 50 generations ago. Which is the best description of how the distribution changed?

50 generations ago, most ostrilopes had low to medium amounts of fur and some had high amounts of fur, now most have high amounts of fur.

50 generations ago there were no ostrilopes, now there are a lot of ostrilopes

50 generations ago, most ostrilopes had low amounts of fur and some had high amounts of fur, now most have low amounts of fur.

50 generations ago, all ostrilopes had the same amount of fur, now most ostrilopes have a high amount of fur.

How do individual glowing jellies get their glowing trait?

Each individual jelly inherits the Green Fluorescent Protein gene from their parents

Each individual can develop a trait to adapt to predators in the environment

Each individual inherits the glowing trait from their offsping

Each individual inherits their parents' Green Fluorescent Protein which causes them to glow

Hummingbirds can have different beak lengths. They use their beaks to reach to the nectar (their food) at the bottom of flowers. Hummingbirds with longer beaks can get food from long flowers. Hummingbirds with shorter beaks cannot reach the nectar in long flowers. If a hummingbird can’t easily reach its food, it will die. The diagrams below show three possible hummingbird populations. If their environment changes to have only long flowers, which of the following hummingbird populations will most likely survive?

Populations 2 and 3 will survive.

All the populations will survive because the hummingbirds will change the length of their beaks if they need to.

Populations 1 and 2 will survive.

Eider ducks live in the ocean and have a layer of warm feathers underneath their regular feathers. They can have feathers of different thicknesses. These feathers help the ducks stay warm in cold water. Ducks with thicker feathers are more likely to stay warm and survive in cold water. But, in warm water, thicker feathers can make the ducks overheat and die. The diagram below shows a population of ducks that live in an area of an ocean. At time 1, the population had the same number of ducks with thin and thick feather layers. At time 2, after many generations, there were many more ducks with a thin feather layer and fewer ducks in the population with a thick feather layer. How did the environment change between time 1 and time 2? How did the population change?

The water became warm. With each generation, more ducks with thin feathers survived long enough to pass on the gene for thin feathers to their offspring.

You cannot tell how the environment changed. With each generation, more ducks passed on the gene for thin feathers to their offspring.

The water became warm. As a result, ducks with thin feathers were more likely to survive, so the ducks with thick feathers changed to have thin feathers.

The water became warm. As a result, ducks with thin feathers were more likely to survive, so both kinds of ducks passed on the gene for thin feathers to their offspring.

There is a kind of snake that can be born with red, yellow, or green skin. Eagles hunt these snakes, but snakes that are the same color as their environment are harder for the eagles to see and catch. A population of snakes once lived in an environment where there was sand and dirt, but no grass. The image above shows what the population looked like then. The environment changed so that green grasses and plants now grow there. The diagrams below show two predictions for what the population could look like after many generations. Which prediction best shows what the population could look like after many generations? What caused it to change?

Prediction 1 is best. Two yellow or red snakes had a baby with a mutation in its genes for the green-skin trait. Because green snakes are more likely to survive, that baby survived long enough to pass on its mutation, so the green trait became more common over generations.

Prediction 1 is best. Green snakes are more likely to survive, so yellow and red snakes began to have offspring with mutations in their genes for the green-skin trait so that their offspring would have a better chance of surviving.

Prediction 2 is best. A snake could have been born with a mutation in its genes for the green-skin trait and lived for a little while. Because green snakes are more likely to die, it would have been more likely to die before it had offspring, so the final population will only have yellow and red snakes.

Prediction 2 is best. A snake could have been born with a mutation in its genes for the green-skin trait, but having a mutation in its genes would have caused it to die when it was born, so the final population will only have yellow and red snakes.

Harbor seals live in northern oceans and have a layer of blubber (fat) that keeps them warm. Seals can have blubber of different thicknesses. Seals with thicker blubber are more likely to stay warm and survive in cold ocean waters. But, in warm ocean waters, thicker blubber can make the seals overheat and die. The diagrams below show three possible seal populations. If their environment changes to have warm water, which of the following seal populations will most likely survive?

All the populations will survive because the seals will change the thickness of their blubber if they need to.

Guppies are small fish that live in South American rivers. They can have different-sized spots on their bodies. The river bottoms are covered in rocks. Guppies with spots that are the same size as the rocks on the bottom are harder for bigger fish to see and catch. The diagram below shows a population of guppies that live in a river. At time 1, the population had the same number of guppies with small and large spots. At time 2, after many generations, there were many more guppies with small spots and fewer guppies with large spots in the population. How did the environment change between time 1 and time 2? How did the population change?

The rocks became smaller. With each generation, more guppies with small spots survived long enough to pass on the gene for small spots to their offspring.

You cannot tell how the environment changed. With each generation, more guppies passed on the gene for small spots to their offspring.

The rocks became smaller. Guppies with small spots are more likely to survive, so the guppies with large spots changed to have small spots.

The rocks became smaller. Guppies with small spots are more likely to survive, so both kinds of guppies passed on the gene for small spots to their offspring.

Northern foxes can have different fur colors. The foxes hunt squirrels for food. Foxes that have fur the same color as their environment are better at getting closer to squirrels and catching them. A population of foxes once lived in an environment where there was not very much snow. The image above shows what the population looked like then. The environment changed so it is now very snowy. The diagrams below show two predictions for what the population could be like after many generations. Which prediction best shows what the population could look like after many generations? What caused it to change?

Prediction 1 is best. Two brown or gray foxes had a baby with a mutation in its genes for the white-fur trait. Because white foxes are more likely to survive, that baby survived long enough to pass on its mutation, so the white-fur trait became more common over generations.

Prediction 1 is best. White foxes are more likely to survive, so brown and gray foxes began to have offspring with mutations in their genes for the white-fur trait so that their offspring would have a better chance of surviving.

Prediction 2 is best. A fox could have been born with a mutation in its genes for the white-fur trait and lived for a little while. Because white foxes are more likely to die, it would have been more likely to die before it had offspring, so the final population will only have brown and gray foxes.

Prediction 2 is best. A fox could have been born with a mutation in its genes for the white-fur trait, but having a mutation in its genes would have caused it to die when it was born, so the final population will only have brown and gray foxes.

Brown anoles are lizards that live on islands in the Bahamas. They can have legs of different lengths. Lizards with shorter legs are better at climbing trees than lizards with longer legs. This makes lizards with shorter legs better at escaping from the floods that sometimes cover the islands. The diagrams below show three possible lizard populations. If their environment changes so that there are many floods each year, which of the following lizard populations will most likely survive?

All the populations will survive because the lizards will change the length of their legs if they need to.

Tree squirrels can have different fur colors. Squirrels live in forests where foxes also live. Foxes hunt squirrels for food. Squirrels that have fur that is the same color as the trees are harder for the foxes to see and catch. The diagram below shows a population of squirrels that live in a forest. At time 1, the population had the same number of black and gray squirrels. At time 2, after many generations, there were many more black squirrels and fewer gray squirrels in the population. How did the environment change between time 1 and time 2? How did the population change?

There were more black trees. With each generation, more squirrels with black fur survived long enough to pass on the gene for black fur to their offspring.

You cannot tell how the environment changed. With each generation, more squirrels passed on the gene for black fur to their offspring.

There were more black trees. Squirrels with black fur are more likely to survive, so the squirrels with gray fur changed to have black fur.

There were more black trees. Squirrels with black fur are more likely to survive, so both types of squirrels passed on the gene for black fur to their offspring.

Which of the following best describes the concept of natural selection?

A process where organisms better adapted to their environment tend to survive and produce more offspring.

A random change in the DNA sequence of an organism.

The intentional breeding of organisms to produce desired traits.

The movement of individuals from one population to another.

In an experiment, a population of beetles is observed over several generations. Initially, the beetles are mostly green, but over time, more brown beetles are observed. What is the most likely explanation for this change?

The brown beetles are better camouflaged in their environment, leading to higher survival rates.

The green beetles migrated to a different area.

A new predator that prefers green beetles was introduced.

The brown beetles have a genetic mutation that makes them more aggressive.

Natural Selection

Authored by Lisa Thompson

Science

8th Grade

NGSS covered

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25 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Look at Diagram 1. How could you describe this newt population?

There are fifteen poison levels shown, and each individual has a different amount of poison.

There is one poison level shown, and all newts have the same amount of poison.

There are three poison levels shown, and no poison-level trait is more common than the others.

There are three poison levels shown, and one poison-level trait is the most common.

Tags

NGSS.MS-LS4-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Look at Diagram 2. Did SOME newts from all poison levels die? (Xs over the newts mean they died)

YES

Tags

NGSS.MS-LS2-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How do you think the environment change between time 1 and time 2? How did the population change?

The environment became brown. Brown foxes are more likely to survive, so the white foxes changed to have brown fur.

The environment became brown. Brown foxes are more likely to survive, so both kinds of foxes passed on the gene for brown fur to their offspring.

The environment became brown. With each generation, more brown foxes survived long enough to pass on the gene for brown fur to their offspring.

Tags

NGSS.MS-LS4-4

NGSS.MS-LS2-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Cactuses with longer spines are less likely to be eaten by sheep. If their environment changes to have many bighorn sheep, which of the following cactus populations will most likely survive?

Populations 1 and 2 will most likely survive.

Populations 2 and 3 will most likely survive.

Only Population 2 will survive because it is the only population with variation.

Tags

NGSS.MS-LS4-4

NGSS.MS-LS3-2

DRAG AND DROP QUESTION

1 min • 1 pt

The process by which organisms with variations that help them survive in their environment live longer, compete better, and reproduce more than those that do not have the variations. (a)

Evolution

Creationism

Natural Selection

Mutation

Tags

NGSS.MS-LS4-4

DRAG AND DROP QUESTION

1 min • 1 pt

An inheirted trait that increases an organism's chance of surviving and reproducing in a particular environment. (a)

Variation

Differentiation

Adaptation

Genetic Specialist

Tags

NGSS.MS-LS4-4

DRAG AND DROP QUESTION

1 min • 2 pts

Survival of the (a) means that individuals that are better adapted to their (b) survive and pass on their (c) more successfully.

fittest

environment

traits

Tags

NGSS.MS-LS4-4

NGSS.MS-LS1-5

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Natural Selection

Look at Diagram 1. How could you describe this newt population?

Look at Diagram 2. Did SOME newts from all poison levels die? (Xs over the newts mean they died)

How do you think the environment change between time 1 and time 2? How did the population change?

Cactuses with longer spines are less likely to be eaten by sheep. If their environment changes to have many bighorn sheep, which of the following cactus populations will most likely survive?

The process by which organisms with variations that help them survive in their environment live longer, compete better, and reproduce more than those that do not have the variations. (a)

An inheirted trait that increases an organism's chance of surviving and reproducing in a particular environment. (a)

Survival of the (a) means that individuals that are better adapted to their (b) survive and pass on their (c) more successfully.

Blue jays with thinner beaks can easily reach and eat the seeds inside pinecones. If their environment changes to have only seeds in pinecones, which of the following blue jay populations will most likely survive?

If this trend continued, which color ostrilope would become more common in the population over time?

If this trend continued, which color ostrilopes would become LESS common in the population over time?

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Similar Resources on Wayground

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Natural Selection

Look at Diagram 1. How could you describe this newt population?

Look at Diagram 2. Did SOME newts from all poison levels die? (Xs over the newts mean they died)

How do you think the environment change between time 1 and time 2? How did the population change?

Cactuses with longer spines are less likely to be eaten by sheep. If their environment changes to have many bighorn sheep, which of the following cactus populations will most likely survive?

The process by which organisms with variations that help them survive in their environment live longer, compete better, and reproduce more than those that do not have the variations. (a)

An inheirted trait that increases an organism's chance of surviving and reproducing in a particular environment. (a)

Survival of the ​ (a) means that individuals that are better adapted to their ​ (b) survive and pass on their ​ (c) more successfully.

Blue jays with thinner beaks can easily reach and eat the seeds inside pinecones. If their environment changes to have only seeds in pinecones, which of the following blue jay populations will most likely survive?

If this trend continued, which color ostrilope would become more common in the population over time?

If this trend continued, which color ostrilopes would become LESS common in the population over time?

Access all questions and much more by creating a free account

Similar Resources on Wayground

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Survival of the (a) means that individuals that are better adapted to their (b) survive and pass on their (c) more successfully.