Natural Selection in Fish

Last updated almost 2 years ago

12 questions

1

In the ocean, there are three varieties of fish- small, medium, and large. Fish are eaten by sharks. Sharks tend to favor the medium sized fish because they are the easiest to catch.

2

Explain how natural selection could have acted over time to cause this shift in the size of the fish population. Be sure to state
1. The original population
2.What trait(s) is the best and why
3.What fish is most likely to reproduce
4. The final population

1

Katydids are insects that live on plants. Their bodies are adapted to look like leaves.

Which of the following best explains why katydids adapted this trait?

Katydids with this trait were better able to make their own food.

Katydids with this trait were better able to blend into their environment and survive.

Katydids with this trait were better able to store nutrients and hibernate

Katydids with this trait were better able to communicate with other insects around them.

A species of moth in England has both a light-colored form and a dark-colored form. In the mid-1800s, the percentage of dark-colored moths increased in areas where black soot from factories covered the trees. The soot in these areas has decreased in more recent times as a result of pollution laws.

Which of the following statements describes what has most likely happened to the moth populations in areas where pollution laws were established (this means there is less soot on trees)?

The moth populations went extinct.

The moth populations migrated south.

The percentage of light-colored moths in the populations decreased.

The percentage of dark-colored moths in the populations decreased.

Scientists measured and recorded the average body size in a bird population over time. One year, a period of cold weather killed many of the birds. A few generations later, the scientists observed that the average body size in the population was larger than it had been before the cold weather. The scientists concluded that the population had evolved through natural selection. Which of the following would provide the best evidence to support the scientists’ conclusion?

The frequency of alleles for body size changed in the bird population.

The size of the bird eggs also increased over time.

The birds with the largest body size were the males.

The number of birds in the population had decreased by 50% or more.

Identify the type of natural selection. Lemurs are a type of monkey with a tail. Lemurs with short tails cannot climb trees and have a hard time surviving. Lemurs with tails that are too long are easily caught by predators. Lemurs with a medium/average size tail are best suited for the environment

Directional

Stabilizing

Disruptive

In the deserts of the southwestern United States, rock formations made from lava flows are found scattered across the sand. The rock pocket mouse, which has dark fur, lives on the black lava rocks. The Apache pocket mouse, which has light fur, lives on the tan sand. Which of the following statements best explains how these two types of mice could have evolved from a common ancestor?

Individual mice changed their fur color to escape their predators

The emigration of mice changed the gene pools in the original population

The original population of mice spread out geographically to relieve overcrowding

Natural selection favored different fur colors in the different habitats

After many generations of sharks eating the fish, the population of fish shifted. Click on all the fish that will be present after natural selection occurred

small fish

medium fish

large fish

Explain how natural selection could have acted over time to cause this shift in the size of the fish population. Be sure to state
1. The original population
2.What trait(s) is the best and why
3.What fish is most likely to reproduce
4. The final population

What type of natural selection is occurring in the ocean?

A. Directional

B. Stabilizing

C. Distruptive 

In the ocean, there are three varieties of fish- small, medium, and large. Fish are eaten by sharks. Sharks tend to favor the medium sized fish because they are the easiest to catch.

Which graph matches the process of natural selection that is occuring in the fish?

Graph 1

Graph 2

Graph 3

What type of natural selection is graph 2 displaying?

Directional

Disruptive

Stablizing

What mouse is best fit for the light colored ground?

A. dark fur mouse

B. light gray fur mouse

C. both mice

Using the concept of natural selection explain how the population of mice will change over time.

A. over time most of the mice will become light gray because the light gray mice blend in better with the ground

B. over time most of the mice will become dark colored because the dark colored mice blend in better with the light ground

C. There will be no change in the number of light gray and dark colored mice

Katydids are insects that live on plants. Their bodies are adapted to look like leaves.

Which of the following best explains why katydids adapted this trait?

Katydids with this trait were better able to make their own food.

Katydids with this trait were better able to blend into their environment and survive.

Katydids with this trait were better able to store nutrients and hibernate

Katydids with this trait were better able to communicate with other insects around them.

A species of moth in England has both a light-colored form and a dark-colored form. In the mid-1800s, the percentage of dark-colored moths increased in areas where black soot from factories covered the trees. The soot in these areas has decreased in more recent times as a result of pollution laws.

Which of the following statements describes what has most likely happened to the moth populations in areas where pollution laws were established (this means there is less soot on trees)?

The moth populations went extinct.

The moth populations migrated south.

The percentage of light-colored moths in the populations decreased.

The percentage of dark-colored moths in the populations decreased.

Scientists measured and recorded the average body size in a bird population over time. One year, a period of cold weather killed many of the birds. A few generations later, the scientists observed that the average body size in the population was larger than it had been before the cold weather. The scientists concluded that the population had evolved through natural selection. Which of the following would provide the best evidence to support the scientists’ conclusion?

The frequency of alleles for body size changed in the bird population.

The size of the bird eggs also increased over time.

The birds with the largest body size were the males.

The number of birds in the population had decreased by 50% or more.

Identify the type of natural selection. Lemurs are a type of monkey with a tail. Lemurs with short tails cannot climb trees and have a hard time surviving. Lemurs with tails that are too long are easily caught by predators. Lemurs with a medium/average size tail are best suited for the environment

Directional

Stabilizing

Disruptive

In the deserts of the southwestern United States, rock formations made from lava flows are found scattered across the sand. The rock pocket mouse, which has dark fur, lives on the black lava rocks. The Apache pocket mouse, which has light fur, lives on the tan sand. Which of the following statements best explains how these two types of mice could have evolved from a common ancestor?

Individual mice changed their fur color to escape their predators

The emigration of mice changed the gene pools in the original population

The original population of mice spread out geographically to relieve overcrowding

Natural selection favored different fur colors in the different habitats

After many generations of sharks eating the fish, the population of fish shifted. Click on all the fish that will be present after natural selection occurred

small fish

medium fish

large fish

What type of natural selection is occurring in the ocean?

A. Directional

B. Stabilizing

C. Distruptive 

In the ocean, there are three varieties of fish- small, medium, and large. Fish are eaten by sharks. Sharks tend to favor the medium sized fish because they are the easiest to catch.

Which graph matches the process of natural selection that is occuring in the fish?

Graph 1

Graph 2

Graph 3

What type of natural selection is graph 2 displaying?

Directional

Disruptive

Stablizing

What mouse is best fit for the light colored ground?

A. dark fur mouse

B. light gray fur mouse

C. both mice

Using the concept of natural selection explain how the population of mice will change over time. 

A. over time most of the mice will become light gray because the light gray mice blend in better with the ground

B. over time most of the mice will become dark colored because the dark colored mice blend in better with the light ground

C. There will be no change in the number of light gray and dark colored mice

Natural Selection in Fish

Natural Selection in Fish

Explain how natural selection could have acted over time to cause this shift in the size of the fish population. Be sure to state1. The original population2.What trait(s) is the best and why3.What fish is most likely to reproduce4. The final population

Katydids are insects that live on plants. Their bodies are adapted to look like leaves.Which of the following best explains why katydids adapted this trait?

Identify the type of natural selection. Lemurs are a type of monkey with a tail. Lemurs with short tails cannot climb trees and have a hard time surviving. Lemurs with tails that are too long are easily caught by predators. Lemurs with a medium/average size tail are best suited for the environment

After many generations of sharks eating the fish, the population of fish shifted. Click on all the fish that will be present after natural selection occurred

Explain how natural selection could have acted over time to cause this shift in the size of the fish population. Be sure to state1. The original population2.What trait(s) is the best and why3.What fish is most likely to reproduce4. The final population

What type of natural selection is occurring in the ocean?

In the ocean, there are three varieties of fish- small, medium, and large. Fish are eaten by sharks. Sharks tend to favor the medium sized fish because they are the easiest to catch.Which graph matches the process of natural selection that is occuring in the fish?

What type of natural selection is graph 2 displaying?

What mouse is best fit for the light colored ground?

Using the concept of natural selection explain how the population of mice will change over time.

Explain how natural selection could have acted over time to cause this shift in the size of the fish population. Be sure to state
1. The original population
2.What trait(s) is the best and why
3.What fish is most likely to reproduce
4. The final population

Katydids are insects that live on plants. Their bodies are adapted to look like leaves.

Which of the following best explains why katydids adapted this trait?

Explain how natural selection could have acted over time to cause this shift in the size of the fish population. Be sure to state
1. The original population
2.What trait(s) is the best and why
3.What fish is most likely to reproduce
4. The final population

In the ocean, there are three varieties of fish- small, medium, and large. Fish are eaten by sharks. Sharks tend to favor the medium sized fish because they are the easiest to catch.

Which graph matches the process of natural selection that is occuring in the fish?