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Messages - Robertt

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1
Plant Sciences, Zoology & Evolution / Re: Need some assistance:RNA is assembled by accident?
« on: 09/04/2016 02:42:48 »
Also, a few comments about "god gaps"

We will always have gaps in our understanding. Whether it is biology, evolution, cosmology, or acoustics... Invoking God when we don't have the answer is at best setting religions up for failure. In the past, reilgious figures and texts have made claims about how the world works, or why things are they way they are, and have repeatedly been shown to be false (or probably not true). Questions have since come up that couldn't have been contemplated millenia, centuries or even decades ago (What does the bible say about quantum teleportation?), and we have repeatedly seen religious figures persecute the scientists, philosophers and inventors that have raised the questions they couldn't answer or provided the answers the haven't questioned.

When discussing the evolution of animals, (or any other species) our fossil record is very sparse in some regards. We don't have an obvious map of the evolutionary tree from one fossil to the next because there have literally been billions of generations, creating countless different variations from one organism to the next. Our own taxanomic differentiation and classification of species is imperfect and imprecise. And if we go by fossil record alone, every time a new fossil is found that links one organism and one of its ancestors, two new gaps are formed (we went from the A—B gap to an A—C gap and a C—B gap).

This also holds for the gaps at the ends of our understanding (rather than between things we understand). Well what's smaller than X? Y is smaller than X. And what is smaller than Y? Z is smaller than Y.... What's bigger than X? W.... What happened before that, and what happened before that, etc. etc. etc.

The scientific process is all about asking these questions, but it also involves looking for the answers. Unfortunately the religious approach has often been one of "we already know--God did it. Case closed!" And it's fine if people don't want to open their own minds to the miraculous world that we live in--even if God did it, don't they want to know how? But I take issue with those who would draw the wool over others' eyes, even if it is their own children.

But now, I have to go light some candles, bless some wine and bring in the shabbos...
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Plant Sciences, Zoology & Evolution / Re: Need some assistance:RNA is assembled by accident?
« on: 09/04/2016 02:16:30 »
I have some answers for a few of these...

Quote from: Rob itswich on 09/04/2016 01:29:40
Proteins are made from right handed amino acids but the only one simulated in the lab is left-handed,how come?

Simply not true. Like, at all. Most labs study amino acids that are the same handedness as those that occur in biology, because (big surprise) those are the ones we want to learn more about and (big surprise) those are the easiest to get because we can isolate them from living organisms. That is not to say we cannot make them on our own. We can make both the left handed and right handed amino acids from scratch in the lab, and we study both.

Quote from: Rob itswich on 09/04/2016 01:29:40
RNA is assembled by accident?

Hard to know exactly what the question is here. Once the nucleobases of RNA are formed, they will naturally come together to form strands. If the question is regarding how the nucleobases formed initially, I don't know the answer myself, but they are not particularly complex molecules, and many direct precursors have been observed in abiotic systems (no life involved...)

Quote from: Rob itswich on 09/04/2016 01:29:40
Why do onions have longer DNA than highly evolved humans?

Evolution is a process that involves adding new genes, removing old genes, and altering old genes. The length of a DNA sequence does not have much relationship with "how advanced" the organism is. As far as we can tell, there is a lot of DNA that does not encode for proteins, and there are a lot of things plants need to do on a cellular level that animals do not (we eat food, they make their own food...)

Quote from: Rob itswich on 09/04/2016 01:29:40
Has there been any evolved tardigrades?

There are several different species of tardigrades, and some are more closely related than others. They reproduce sexually, so individuals are genetically distinct from their parents. Sounds like evolution to me...
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