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taramarie1112 taramarie1112
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11 years ago Edited: 11 years ago, taramarie1112
Six different one-drop samples in a Paramecium sp. population had the following numbers of organisms: 4, 6, 5, 3, 6, and 6. If 20 drops represent 1 mL of solution, and the volume of the solution is 40 mL, calculate the size of the population.

I have tried different ways and still cant figure it if you can help me with the formula to use to help me understand the steps i need to do that would be appreciated
Post Merge: 11 years ago

sorry its on page 740 do i use the population density forumla?
Post Merge: 11 years ago

i did 20(number of drops )/ 6(number of sample drops) 3.3
3.3/ 30( number of organisms in samples) = 100
100 * 20 = 4000
Source  biology 30 pg 729 #4
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wrote...
#1
Educator
11 years ago
https://biology-forums.com/index.php?topic=29943.0
taramarie1112 Author
wrote...
#2
11 years ago
i saw the previous post but it did not help i was hoping someone could show me if i did it right
wrote...
#3
11 years ago
All I did was take the average of number of organisms (N) per 1 drop. (30/6 = 5 organisms per 1 drop)
Dp = 5 org per drop * (20 drops x 40mL)
Dp = 5 * 800
Dp = 4000
wrote...
#4
11 years ago
First you take the average which is 5. (30/6)
Second, you divide the average with the 20 drops that makes into 1 mL. (5/20=.25)
Lastly, you take .25 and multiply with 800 (20 drops x 40 mL) which gives you the size of the population of 200.
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