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Biology


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#71 cari2483

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Posted 06 April 2009 - 05:43 PM

So, I am going to take a stab at this, and there is no guarantee that this is right because it has been a few years but here it goes:


.5/43=x/60

to solve for X the equation read: (I used the * as a multiplication symbol so as not to be confusing)

60/60 * .5/43 = x/60 * 60/60

30/2580 = X

3/258 = X

3/258 = .01 per minute

.04 *43 min = .43 (which is half)

.43 * 2 = .86 to be full

So, it would take 86 minutes from start to finish to be full

So, 12:00 + 86 minutes = 1:26

So, at 1:26 the dish should be full.

Any chance that is close to right?

Edited by cari2483, 06 April 2009 - 05:50 PM.

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#72 cari2483

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Posted 06 April 2009 - 06:00 PM

Wait...I just thought about it and realized I did all that work for nothing LOL. If the dish was half way full at 12:43 and every minute, the organisms double, then at 12:44 the dish should be full...right?

Like I said in the previous post, it has been a while and the scientific size of the organism aside I still didn't see how 11:59 could have been the right answer, even after reading all of the posts.
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#73 rookie1ja

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Posted 06 April 2009 - 06:34 PM

Wait...I just thought about it and realized I did all that work for nothing LOL. If the dish was half way full at 12:43 and every minute, the organisms double, then at 12:44 the dish should be full...right?

Like I said in the previous post, it has been a while and the scientific size of the organism aside I still didn't see how 11:59 could have been the right answer, even after reading all of the posts.

well spotted

answer for old wording is 11:59
answer for new wording is 12:44
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#74 Oversat

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Posted 23 September 2009 - 02:45 PM

I believe the point of the exercise has been missed: Its a logic puzzle, not a Biology question. The answer is 12:44 (in one more minute) because 1/2(amount of petri dish full) x 2 (the number of cells after each divide) = 1
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#75 tarzan

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Posted 05 October 2009 - 03:42 PM

12.44
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#76 passthecookies

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Posted 22 April 2010 - 12:46 AM

ok well not to be rude but cells after division are actually the same size...the chromosomes and nuclei from the original cell are doubled and equal in size. If what has been previously stated is true then an older person's skin cells would be significantly smaller than a newborn's skin cells for example because they have been divided a vast amount more which is wrong...the plate would be full one minute later if it were only half full a minute before. Thank-you, for you have just been out smarted by a 13 year-old girl.
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#77 mensan578

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Posted 24 April 2010 - 10:25 PM

ok well not to be rude but cells after division are actually the same size...the chromosomes and nuclei from the original cell are doubled and equal in size. If what has been previously stated is true then an older person's skin cells would be significantly smaller than a newborn's skin cells for example because they have been divided a vast amount more which is wrong...the plate would be full one minute later if it were only half full a minute before. Thank-you, for you have just been out smarted by a 13 year-old girl.


Not to be rude "passthecookies", but in all logic, that's not necessarily true. Depending on the organism, mitosis takes a different variability rate.
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