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visits member for 2 years, 4 months
seen Feb 2 at 15:50

HS Biology teacher and avid home remodeler in Louisville, KY.


Feb
2
awarded  Commentator
Feb
2
comment Why don't birds in flocks fly into each other?
This might be a good starting point....npr.org/2013/06/13/191348007/…
Jan
29
revised Crossing white eyed Drosophila with sepia eye
added 108 characters in body
Jan
28
answered Crossing white eyed Drosophila with sepia eye
Jan
28
asked Crossing white eyed Drosophila with sepia eye
Oct
15
awarded  Popular Question
Sep
24
awarded  Autobiographer
Jul
2
awarded  Curious
May
5
awarded  Critic
May
5
comment Why is Portuguese man o' war considered a colony?
I'll buy this, but it doesn't change the basic question. If they are so integrated, why aren't they simply considered a single organism like us? They derive from a single fertilized egg. They divide asexually from that egg. The individual cells take on specialized roles physiologically and structurally. Only one set of cells reproduces. Nothing about any of this suggests colony to me. Am I missing something? To me it just seems that because there are individual polypoid cells, people are hesitant to say it is one organism.
Apr
9
comment Appropriate statistical test for a student lab?
You may have a point on the off topic bit, though I've already started, so.... :) To clarify the lab a bit: Students press candies together over three rounds of "natural selection" (starting with 12 candies of each type- m&ms, skittles, etc- 4 types total). Survivors go on to the next round and replicate when the population gets below a certain number. We do another round where kids pour the candy on desks pushed together and some bounce in to the neighbors areas to represent migration, and another simulation for a bottleneck. Students then look at how much each factor affected the #s.
Apr
8
asked Appropriate statistical test for a student lab?
Dec
4
comment Why do yeast ferment Equal sweetener
I agree with all of this, except there is one problem with the data. (Keep in mind this was High School Bio) A packet of equal is far less mass than a packet of sucrose(since aspartame has such a high sweetness profile), and as such a packet contains a very small amount of dextrose compared to the amount of glucose/fructose in the sucrose packets. That said, there was nearly as much CO2 generated by two packets of Equal as four packets of sucrose. Granted, there is an upper limit to the yeast growth curve and metabolism, but there were higher rates as we increased from 2 to 4 packets sucrose.
Dec
4
awarded  Yearling
Dec
3
asked Why do yeast ferment Equal sweetener
Nov
18
asked How much does the Hayflick limit/telomere length vary across taxa and within humans?
Nov
8
accepted Common Ancestry of ETCs and ATP Synthase complexes
Nov
4
asked Common Ancestry of ETCs and ATP Synthase complexes
May
23
comment Why is a slow worm not considered a snake?
I'd agree that the visual system of cephalopods and vertebrates likely evolved in one common ancestor. However, this was a rudimentary "eye". The modern lens-type eyes of both groups almost certainly evolved independently from this common ancestral organ.
May
23
answered Has medical progress stopped human evolution?