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Drift

Drift

Collectively, stream invertebrates (almost wholly the aquatic larval stages of insects) that voluntarily or accidentally leave the substrate to move or float with the current, as well as terrestrial invertebrates that drop into the stream. Also, any detrital material transported in the water current.


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Red lichen on most rocks but not some

... be to keep noxious weeds at bay. So the target species of weeds they may have sprayed at the bottom of the lichen growth may of oversprayed from drift onto t he rocks and killed the lichen in that area, any selective or non selective herbicide would do this. If you look closely there appears ...

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by vk4vfx
Wed Nov 20, 2013 8:55 am
 
Forum: Botany Discussion
Topic: Red lichen on most rocks but not some
Replies: 3
Views: 1459

Re:

... may begin to select for the traits that are advantageous in their environment. The tool-making traits may be eliminated simply by genetic drift. Or the tool-making traits may have certain disadvantages, such as higher energy requirements, that simply aren't worth it. In contrast, if this ...

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by wildfunguy
Sat Oct 19, 2013 3:13 pm
 
Forum: Evolution
Topic: Is complexity inevitable?
Replies: 16
Views: 10000

Re:

... of mutations are neutral; such mutations will accumulate generation by generation, and many will become fixed. This is the basis of "genetic drift". Another implication: the deleterious mutation rate (more than 2) is high. The real force of the original question of the thread is -- how ...

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by ChrisHoStuart
Tue Oct 15, 2013 2:19 pm
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 7844

Population genetics - make inferences from allele frequency

... inference about something like dominant-recessive relationship or lethal homozygotes? I assume random mating (no sexual selection), diploid, no drift (genetically well connected) or something that meets Hardy-Weinberg equilibrium assumptions. Thanks!

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by Young
Sun Aug 25, 2013 10:52 pm
 
Forum: Genetics
Topic: Population genetics - make inferences from allele frequency
Replies: 1
Views: 1330

Re: Refutation of Evolution theory

... gas is too unstable and solid is too static. If so, the organism must be contained by some kind of membrane otherwise its precious contents will drift away in the water due to natural diffusion or drifting of water due to temperature variations in the water from sunlight, etc. or from heat generated ...

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by RabbitPhilosopher
Thu Jun 20, 2013 10:27 pm
 
Forum: Evolution
Topic: Refutation of Evolution theory
Replies: 13
Views: 12496
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