Botany - Lab Report 4 - mm in length After counting the...

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Blane Smith October 3, 2007 Biology 104 Population Growth in Duckweed P: Duckweeds are free floating aquatic plants that reproduce asexually. Our trial was to count the duckweed Population growth over a 5 week period of time. To start this lab, we were instructed to fill two flasks with 100-200 ml of local pond water. We then put 2 duckweeds in flask 1 and 15 duckweeds in flask 2. Every week, during lab we would check on the growth of the duckweed population. It was a very difficult process because we could only count thalli leaves that were larger than 2 mm in length. U: The only error that our group had was a counting error. We had a total of three people that came up with three completely different numbers. This was not going to work so we decided to count them together and measure for duckweeds that were larger than 2
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Unformatted text preview: mm in length. After counting the duckweeds four times in week five of the experiment, we agreed on 58 totals in flask 2. At the end of the experiment, we came up with 3 less duckweed in flask 2 than we counted the previous week, for a total of 55. The total number of duckweeds in flask 1 was 7. N: This experiment taught me a few things about the growing area and how it can limit the growth of a species. I was expecting similar results to what we had at the end of the experiment. However, I did not think that the population was going to decrease in the last week. The limit of duckweed was expected because I knew they could rapidly reproduce until they started smothering each other....
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