Search found 37 matches

by Dougalbod
Thu Dec 17, 2009 9:10 am
Forum: General Discussion
Topic: cold and excersize
Replies: 17
Views: 7898

Re: cold and excersize

okay in a simpler language. when i get cold i have observed that it tends to reduce when i play soccer. i do not why this happen. is it phsychological? my grandmother says the heat in the body increases and counteracts the cold. which i do not seem to approve is it that the circulation increases in...
by Dougalbod
Mon Dec 07, 2009 3:01 pm
Forum: Evolution
Topic: a question on evolution
Replies: 4
Views: 4381

Re: a question on evolution

Any species that is not extinct is by definition successful in evolutionary terms.
Those species that are now extinct were unsuccesful - they were unable to respond to changes in their environment.


Dougal
by Dougalbod
Mon Nov 16, 2009 12:07 pm
Forum: Evolution
Topic: About Physiological Darwinism:From Fitness to Optimality
Replies: 13
Views: 25582

Re: About Physiological Darwinism:From Fitness to Optimality

Wellalt, In general I'm still struggling to understand what you are trying to say, rather than quoting these difficult to follow texts, could you paraphrase for me? Specifically I don't see how this example of the earthworm can't be easily explained by mainstream ideas about NS and adaptation.... Th...
by Dougalbod
Mon Nov 16, 2009 11:55 am
Forum: Evolution
Topic: Passing on mutations?
Replies: 8
Views: 7141

Re: Passing on mutations?

There are probably different estimates and ways of calculating this, but here is one figure..... Average mammalian genome mutation rate is 2.2 × 10−9 per base pair per year ("Mutation rates in mammalian genomes", Kumar, Subramanian, PNAS January 22, 2002 vol. 99 no. 2 803-808. m) I think t...
by Dougalbod
Fri Nov 13, 2009 12:03 pm
Forum: Evolution
Topic: About Physiological Darwinism:From Fitness to Optimality
Replies: 13
Views: 25582

Re: About Physiological Darwinism:From Fitness to Optimality

It's Friday. I've read the above three times and it is an excellent example of obfuscation. I think what it says is that the Modern Synthesis is wrong because Darwin, writing decades before the development of the Modern Synthesis, didn't know about Mendelian Genetics and therefore our understanding ...
by Dougalbod
Tue Nov 03, 2009 3:29 pm
Forum: Botany Discussion
Topic: The lotus effect and the transpiration
Replies: 4
Views: 4066

Re: Can you help me?

Hi! I need an urgent response to a question. I know for a hydrophobic effect on the surface of lotus flower(precisely: the surface of the leaf), but me interest how is conducted the transpiration by this flower given the superhydrophobic effect. Thank you! The water repelling wax on the leaf will e...
by Dougalbod
Tue Nov 03, 2009 3:26 pm
Forum: Evolution
Topic: 3 best disproofs of evolution
Replies: 22
Views: 15655

Re:

you say The octopus, assuming it was a scientific octopus, would have the same understanding of population growth as we do, nothing but an ethnocentric comment ... Can you explain to me how this is an ethnocentric comment, or do you think the fundamental laws of physics and maths are different for ...
by Dougalbod
Tue Nov 03, 2009 2:05 pm
Forum: Evolution
Topic: 3 best disproofs of evolution
Replies: 22
Views: 15655

Re:

you say an octopus with a different perceptual system would probably have a different idea about evolution and a whole lot of different concepts The octopus, assuming it was a scientific octopus, would have the same understanding of population growth as we do, after all we can observe and measure p...
by Dougalbod
Thu Oct 29, 2009 9:57 am
Forum: Zoology Discussion
Topic: whales
Replies: 23
Views: 26725

The fish and whales while both vertebrates, evolved to swim at different times and via different evolutionary pathways - the evolution of their tails has solved the same problem in slightly different ways. In the same way that insects, bats and birds have evolved wings - they are all adapted to fly ...
by Dougalbod
Thu Oct 29, 2009 9:48 am
Forum: Cell Biology
Topic: Complementary Base Pairing
Replies: 5
Views: 6613

Perhaps explaining that complementary base pairing provides a means to replicate the genetic material - quite important for the cell cycle....

Dougal
by Dougalbod
Tue Oct 27, 2009 10:06 pm
Forum: Ecology
Topic: adaptations in humans
Replies: 8
Views: 18469

Re:

futurezoologist wrote:Presently as Astus said we are changing our environments to suit us instead of the other way around.


Most organisms (all organisms?) change their environment - but humans are doing it on a global scale!
by Dougalbod
Fri Oct 23, 2009 9:18 am
Forum: Evolution
Topic: Metaevolution
Replies: 1
Views: 1518

I think you could certainly argue for a form of cultural evolution in humans and perhaps some other primates, where learned behaviour effects selection (at least in the short term). However whether this kind of artificial selection is sustainable over a long time period is perhaps open to doubt - na...