Lab: Natural Selection

Question 1

Did you read the Student Guide carefully?

Revolt · Accepted Answer

yes

Question 2

The sentences below combine to form a strong explanation. Check each sentence that resembles part of your response.

Revolt · Accepted Answer

A percentage compares the number of birds in the flock to the total number of birds in all flocks.; If the percentage is high, the flock is more successful, so the flock should grow.; If the percentage is low, the flock is struggling to eat, so the flock should shrink.

Question 3

In the lab, you will change the number of birds with each beak phenotype for the second and third generations. What row of the data table will be the basis for computing new numbers?Number of insects eatenNumber of seeds eatenNumber of fruit eatenTotal food eaten eaten by the flock✔ Percentage of food eaten by the flock

Revolt · Accepted Answer

✔ Percentage of food eaten by the flock

Question 4

The sentences below combine to form a strong explanation. Check each sentence that resembles part of your response.

Revolt · Accepted Answer

Yes, this lab will address the lesson question.; The procedure shows two different food situations—three foods and two foods.; However, the initial populations of birds are the same.; Therefore, at the end, you can compare generation three for each food situation and measure the effect of the food change.

Question 5

The lesson question for this lab is “What is the effect of the type of food available on the frequency of different types of bird beaks?” The the lab procedure you just studied should help you address this question. Will it? Explain.

Revolt · Accepted Answer

Yes, this lab will address the lesson because it tests two different food situatuins while also keeping both populations allowing us to compare the beak accross all those generations

Lab: Natural Selection Answers

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