Population biology | Biology homework help

Population Biology

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Visit Population Biology and complete the virtual lab. 

http://www.mhhe.com/biosci/genbio/virtual_labs/BL_04/BL_04.html

 

This lab gives you the opportunity to explore the affects of competition on population growth. Follow the instructions on the Population Biology Submission Form. Using this worksheet, you will answer the lab questions and fill in the table on the Population Biology Submission Form. Save it as a Word document and submit it.

 

 

Alternative Assignment:

 

Write a paper on how competition between different species is important in the shaping of biological populations, including the possibility of such competition leading to extinction.

 

The paper must be two pages in length and formatted according to APA style. You must use at least one recent scholarly source other than the textbook to support your points. Cite your source in text and on the reference page.

 

Laboratory: Population Biology

Complete the Population Biology Lab found at: http://www.mhhe.com/biosci/genbio/virtual_labs/BL_04/BL_04.html. This lab gives you the opportunity to explore the affects of competition on population growth.  

CAREFULLY, follow the instructions to conduct your virtual experiments.  Fill in the table below as you go.  The questions below are the same ones found in the “journal” of the lab.  Hint: Make sure you read click on the “Information” box; valuable information for answering the questions can be found there! You are required to answer all six questions and submit this document to the Dropbox.  Do NOT email the journal questions to your instructor through the website above.

Paramecium Growth Data

P. aurelia grown alone, cells, mL

P. caudatum grown alone , cells, mL

P. aurelia grown in mixed culture, cells/mL

P. caudatum grown in mixed culture, cells/mL

Day 0

 

 

 

 

Day 2

 

 

 

 

Day 4

 

 

 

 

Day 6

 

 

 

 

Day 8

 

 

 

 

Day 10

 

 

 

 

Day 12

 

 

 

 

Day 14

 

 

 

 

Day 16

 

 

 

 

 

Journal Questions

1.  Make a hypothesis about how you think the two species of Paramecium will grow alone and how they will grow when they are grown together.  (Make sure you understand what a hypothesis is before you address this!)

 

 

2.  Explain how you tested your hypothesis.  (Give details of how you conducted your experiment. Consider this the “Methods” section of a lab report.)

 

 

3.  On what day did the Paramecium caudatum population reach the carrying capacity of the environment when it was grown alone? How do you know?

 

 

4.  On what day did the Paramecium aurelia population reach the carrying capacity of the environment? How do you know?

 

 

5.  Explain the differences in the population growth patterns of the two Paramecium species. What does this tell you about how Paramecium aurelia uses available resources?

 

 

6.  Describe what happened when the Paramecium populations were mixed in the same test tube. Do the results support the principle of competitive exclusion?

 

 

7.  Explain how this experiment demonstrates that no two species can occupy the same niche.

 

 

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