Bio 101 week 3 how do environmental changes affect a population? lab

BIO/101 Week 3 Lab (***** Lab Notebook + Answered All 10 Questions + References *****)

 

 

Complete the MasteringBiology Lab: How Do Environmental Changes Affect a Population? located in the MasteringBiology Interactive Media link.

Complete the “How Do Environmental Changes Affect a Population Lab” worksheet by taking notes from the investigation and answering the questions associated with the investigation.

 

 

Process of Science

 

How Do Environmental Changes Affect a Population?

 

 

Lab Notebook

 

Global Warming Data Table

Number of:

Size

Color

 

Large

Medium

Small

Black

Brown

Parental generation

 

 

 

 

 

10th generation

 

 

 

 

 

20th generation

 

 

 

 

 

30th generation

 

 

 

 

 

 

Graph your Global Warming data, using this key:

Large leafhoppers =

Medium leafhoppers = O

Small leafhoppers =

 

Black leafhoppers = X

Brown leafhoppers = X in color

 

graph1a

 

 

 

 

Predator Change Data Table

Number of:

Size

Color

 

Large

Medium

Small

Black

Brown

Parental generation

 

 

 

 

 

10th generation

 

 

 

 

 

20th generation

 

 

 

 

 

30th generation

 

 

 

 

 

 

Graph your Predator Change data:

graph2

 

 

Vegetation Change Data Table

Number of:

Size

Color

 

Large

Medium

Small

Black

Brown

Parental generation

 

 

 

 

 

10th generation

 

 

 

 

 

20th generation

 

 

 

 

 

30th generation

 

 

 

 

 

 

 

Graph your Vegetation Change data:

graph3

 

 

 

Pesticide Application Data Table

Number of:

Size

Color

 

Large

Medium

Small

Black

Brown

Parental generation

 

 

 

 

 

10th generation

 

 

 

 

 

20th generation

 

 

 

 

 

30th generation

 

 

 

 

 

 

Graph your Pesticide Application data:

graph4

 

 

Questions

 

1. What role does genetics play in the variation seen in this leafhopper population?

 

2. Note the results from the 20th generation under global warming conditions. Before continuing with the 30th generation, predict the population composition of the 30th generation.

 

3. What happened to the proportion of each type of leafhopper in subsequent generations under global warming conditions? Suggest a reason why the traits of the 30th generation make this population better adapted to its altered environment.

 

4. Why would you expect a change in predators to cause a difference in the types of leafhoppers being selected?

 

5. Note the differences between the parental, 10th and 20th generations when the predator changed from a bird to a snake. What evidence supports the view that leafhopper size is not affected by a change in predators?

 

6. What happened to the proportion of each type of leafhopper in subsequent generations when the predator changed from a bird to a snake? Suggest a reason why the traits predominant in the 30th generation make this population better adapted to the change in predators.

 

7. Describe some human activities around your school that could have influenced the natural vegetation in the area.

 

8. Note the differences between the parental and the 30th generations. What happened to the proportion of each type of leafhopper when the vegetation changed? Suggest a reason why the traits of the 30th generation make this population better adapted to its altered environment.

 

9. Identify some major sources of pesticides in your area.

 

 

10. What happened to the proportions of leafhoppers in each subsequent generation when pesticides were added to the environment? Explain why all the leafhoppers were not killed by the pesticide application.