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Wings

wing-shell

(Science: zoology) Any one of various species of marine bivalve shells belonging to the genus avicula, in which the hinge border projects like a wing.

Any marine gastropod shell of the genus strombus. See Strombus.

Any pteropod shell.


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Re:

... One can frighten the young of certain bird species by moving above them along a straight line an object shaped like a bird with outstretched wings. Other shapes won't elicit that reaction. You're almost like Aristotle rejecting Plato's notion of the "innate ideas" (built-in ideas, ...

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by Gannet
Sun Mar 02, 2014 3:40 pm
 
Forum: Zoology Discussion
Topic: Are predators always smarter than their prey?
Replies: 12
Views: 8079

Are predators always smarter than their prey?

... One can frighten the young of certain bird species by moving above them along a straight line an object shaped like a bird with outstretched wings. Other shapes won't elicit that reaction. You're almost like Aristotle rejecting Plato's notion of the "innate ideas" (built-in ideas, ...

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by piscilactovegetarian
Fri Feb 28, 2014 12:30 am
 
Forum: Zoology Discussion
Topic: Are predators always smarter than their prey?
Replies: 12
Views: 8079

How Does Natural Selection Create Ordered Variation?

1) why should dynamic filter result in uniform result? That just doesn't make sense, if you once select for for wings, you'll get short wings, if you select for long wings, you'll select long wings. Here's why Because the changes in the environment will just as likely negate the ...

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by Doom
Tue Jan 21, 2014 11:35 pm
 
Forum: Evolution
Topic: How Does Natural Selection Create Ordered Variation?
Replies: 7
Views: 3209

How Does Natural Selection Create Ordered Variation?

1) why should dynamic filter result in uniform result? That just doesn't make sense, if you once select for for wings, you'll get short wings, if you select for long wings, you'll select long wings. 2) why do you think that the environment always changes into exact opposites?

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by JackBean
Tue Jan 21, 2014 5:03 pm
 
Forum: Evolution
Topic: How Does Natural Selection Create Ordered Variation?
Replies: 7
Views: 3209

Re: How Does Natural Selection Create Ordered Variation?

... that natural selection can't make any progress then, doesn't it? Think about it this way: You cannot delete established mutations. If shorter wings are a problem now, only individuals carrying NEW counteracting mutations, say double wings, will survive...

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by Cat
Sat Jan 18, 2014 4:59 pm
 
Forum: Evolution
Topic: How Does Natural Selection Create Ordered Variation?
Replies: 7
Views: 3209
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