McClintock discovered transposable genes because of their affects on the appearance of corn. If they are non-coding, they should not have that effect. So I think that indicates that they can move out of the junk DNA. Comments?
Transposons are supposed to jump in and out of DNA. And usually everything goes OK.
Sometimes they get left behind in the host genome because the transposon loses a chunk of something important (and it can't move anymore).
McClintock's maize transposons suppressed a color gene (I don't know how -- probably because it was sitting in the gene). If the transposon jumped, the gene suppression disappeared and the maize started making pigment.
So, technically, those transposons weren't junk DNA (cause they still worked).
I've long wondered why some birds run/walk and others hop. It doesn't seem to correlate with their feeding habits or habitat in an obvious way. For example, some ground feeders like robins and blackbirds hop, while wagtails and pigeons tend to run or walk. Even starlings walk on the ground, even though they spend a lot of time in trees where they would have to hop. Crows do both more regularly then other birds I have seen.
i almost think we should abandon the search script entirely, and just have that top link go to google. i've seen pages that have a "search within webpage" and "search the web" option, via google. iirc, talk.origins uses something similar. that would work way better here.
i think it's pretty much what everyone uses anyways. the built-in search feature verily doth suketh. it does some really wacky things, and takes forever to do them.
Quick question to the experienced; is it possible (or wise) to attempt to go to school for a degree in the sciences while working full-time?
Of those I have asked and replied, "it was possible" , most claimed that the time required for class (and labs, especially) while working full-time is strained, and manifests itself as a great stressor to students. Is this true?
Any feedback from those with science degrees is much appreciated.
I've long wondered why some birds run/walk and others hop. It doesn't seem to correlate with their feeding habits or habitat in an obvious way.
To me, it correlates with bird physical-size-and-ability and their environment.
Taking the following into consideration:
-hopping is faster than running -hopping takes more energy than running -as bird size increases, the energy needed to hop also increases -hopping can be necessary to get over rough terrain -what's "rough" depends on the bird's physical characteristics
And it becomes clearer that smaller birds will hop more often as most terrain is "rough" to them, and it doesn't take that much more of an energy increase. While larger birds are more capable of stepping over most obstacles, and hopping becomes a less efficient use of energy.
We still see small birds walking/running on flatter terrain when they're not in any hurry. Or large birds hopping when terrain gets rough for them, or when panic sets in.
Seems to me it's more of a efficiency decision by each specific bird in each specific situation depending on energy conservation, environmental terrain and speed considerations.