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Questions that don't need their own topics vol.2; New and fresh
Topic Started: Jan 4 2018, 11:18 AM (26,873 Views)
Tartarus
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Scrublord
Mar 24 2018, 11:20 PM
New question. How did bone skeletons first evolve in vertebrates? Could the same set of features that led to bone skeletons have just as easily arisen in other animals besides chordates?
Seeing as bone is derived from cartilage and cartilage apparently exists in various types of animal besides just the chordates then I see no reason why one couldn't potentially have had bony skeletons evolve in non-chordate animals. Could perhaps make for some good alternative evolution spec.
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Sceynyos-yos
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Cool_Hippo43
Mar 25 2018, 08:22 AM
about pigmentation in plants ...
I would like to know why plants are green (not necessarily how that works but why green color?) is the most energetic way or something or is it random? could plants with other pigments exist? such as yellow or blue plants? If so, what could exist could be that the ancestors of the plants "changed color" evolving into plants with different colors (but still being plants), or the only possibility would be another totally separate kingdom.
  would it be disadvantageous to have other colors without being green? (using as base a planet analogous to earth and a star similar to the sun)

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ZoologicalBotanist
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There are also a few plants that have leaves that are not green, and are colors such as pink, red, or purple. Now, these plants are mostly ornamental, cultivated varieties, but a few are like that in the wild as well. Can't remember which ones off the top of my head though.


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Archeoraptor
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there is also red algae as I mentioned
and purple bacteria
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Cool_Hippo43
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so plants of all colors can exist, that depends on the star.
but based on something like the sun, there could easily be bluer or greener plants (such as cyanobacteria and purple arhaceae)
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Archeoraptor
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non green pterrestrial plants are still something I don't understand
also important to say about the bacteria, their are anaerobic
but yeah plants could have totally have use other pigments
Nano´s blueworld uses lichens with cyanobacterial pigments and teh fact that green pigments were dominant was a bit of "random chance" afaik
Astarte an alt eocene world,now on long hiatus but you never know
Fanauraa; The rebirth of Aotearoa future evo set in new zealand after a mass extinction
coming soon......a world that was seeded with earth´s weridest
and who knows what is coming next...........

" I have to know what the world will be looking throw a future beyond us
I have to know what could have been if fate acted in another way
I have to know what lies on the unknown universe
I have to know that the laws of thee universe can be broken
throw The Spec I gain strength to the inner peace
the is not good of evil only nature and change,the evolution of all livings beings"
"
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Setaceous Cetacean
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On a somewhat related note, what of photosynthetic life forms that aren’t the same color as their photosynthetic pigment?

For instance, as a hypothetical example, could a green plantimal become red or blue or brown if it offers a selective advantage (e.g. camouflage), or would its body being a different color from its photosynthetic pigments decrease light absorption too much?

Must organisms give up their photosynthetic devices if they wish for their skin to assume different colors?
If you like balloons, the color red, or mixotrophic plants derived from photosynthetic vertebrate-analogues, then check out my xenobiology project Solais

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Russwallac
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An organism which is a different color than its photosynthetic pigment is just blocking more light from said pigment.
"We've started a cult about a guy's liver, of course we're going to demand that you give us an incredibly scientific zombie apocalypse." -Nanotyranus

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ZoologicalBotanist
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Russwallac
Mar 26 2018, 02:01 PM
An organism which is a different color than its photosynthetic pigment is just blocking more light from said pigment.
Even if the plant is purple and their photosynthetic pigment is blue? I thought that might work because purple is a mixture of blue and red.


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Russwallac
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Purple light isn't a mixture of blue and red light.
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Cool_Hippo43
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Okay, I think of a planet with less gravity and an atmosphere denser than the earth. In this place are only relatives of gastropods, bivalves, plateomints, lobopods, echinoderms and other things that you consider "slow" and invertebrate (no arthropods). How could the flight evolve in this place? Maybe gastropods flapping "wings", but I do not know if that is a good one. Or descendants of lopodes (as in diyu) that glide and can flap wings. so how can flight evolve into soft stuff? does some kind of Ossification necessary for such an action? What else could you have on this planet that would not be a risk to the slow gastropods?
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ZoologicalBotanist
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Does anyone know how electricity might interact with different minerals, especially ones that are most commonly found in caves, such as quartz, fluorite, gypsm, calcite, etc.?


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Cool_Hippo43
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assuming that a super advanced (very advanced) civilization, which has the knowledge of building planetary systems and creating planets, how could they save a star dying? Just always throwing more "fuel" in it?
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Tartarus
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Well stars are powered by nuclear fusion and if I'm not mistaken this is due to all that gas being compressed so tightly (NOTE: technically stars are in a plasma state rather than a gaseous one, though all that plasma is derived from gases). I guess throwing some more gas onto the star could help though there are the issues of where to obtain all this extra gas and how to get it to be incorporated into the star. I have no idea how that would work or even if it could at all work.
Edited by Tartarus, Mar 28 2018, 06:52 PM.
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IIGSY
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Cool_Hippo43
Mar 26 2018, 05:02 PM
Okay, I think of a planet with less gravity and an atmosphere denser than the earth. In this place are only relatives of gastropods, bivalves, plateomints, lobopods, echinoderms and other things that you consider "slow" and invertebrate (no arthropods). How could the flight evolve in this place? Maybe gastropods flapping "wings", but I do not know if that is a good one. Or descendants of lopodes (as in diyu) that glide and can flap wings. so how can flight evolve into soft stuff? does some kind of Ossification necessary for such an action? What else could you have on this planet that would not be a risk to the slow gastropods?
It's important to remember that vertebrates and arthropods came from very "lowly", squishy stuff (lancelet like animals and lobopods respectively).

They key to getting past this is the development of 2 key features.

A hardened skeleton (internal or external) and a skin/covering that prevents significant water loss. These conditions are what allow for the rapid spread into inland environments and set the conditions for flight to evolve.
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