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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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Could Hardy-Weinberg terminology be more precise?

... Could biologists simplify the concepts into something more partitioned, perhaps to aid the deduction of causes? Natural selection and genetic drift primarily concern whether individuals reproduce, and subsidiarily whether individuals survive. In contrast, mate selection concerns not only whether ...

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by wildfunguy
Wed Nov 19, 2014 4:56 pm
 
Forum: General Discussion
Topic: Could Hardy-Weinberg terminology be more precise?
Replies: 0
Views: 593

Can human body hair disappear as a result of... clothing?

... hair because it is not needed anymore (because now we have clothes). Is this correct? I understand that it is possible due to mutation and genetic drift, but is it really probable?

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by jplr
Fri Oct 10, 2014 6:26 pm
 
Forum: Evolution
Topic: Can human body hair disappear as a result of... clothing?
Replies: 4
Views: 1380

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: 2427

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: 17831

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: 15668
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