How can it be shown that the form of a flower was not intentional?
Easy. The same way any other natural phenomenon is not intentional. Natural selection.
Your error is
argumentum ad ignorantiam, more specifically, an argument from personal incredulity.
You really need to brush up on your basic biology. Natural selection can produce amazing things: photosynthesis, coagulation cascades, Krebs cycle -- these are much more complex and amazing than the mere appearance of a flower, but, like the flower, they are completely explainable by natural, unintentional steps.
How is it known that the natural mechanisms have not been guided, even in the initial design of matter and energy, which led to our physical universe?
It's not "known," but it' also not necessary. Natural, observable mechanisms can explain all of this. Invoking a magical
deus ex machina is entirely unnecessary. Why would you do it if not to bolster a comfortable and familiar folklore?
How are these things known? Pure science tells us that it cannot tell us these things but many people want to use science and say that it has told us these thing.
The reason the scientific facts are known is clear. The research is published in technical journals and textbooks. It's readily available. Facts are clearly identified as facts, and hypotheses as hypotheses.
One thing that science seems to have proven to many people is that there is no God, and it cannot actually prove that.
These people are misinformed, probably through religious propaganda. If a heliocentric solar system disproves God to you, it's your own problem.
Is this a God of the Gaps thing or are you going back to the beginnings, the creation?
God-of-the-gaps is a reaction to evolution. It doesn't apply in larger spheres like cosmology.
Surely science in many ways is showing us how God did things.
Science shows us that the things attributed to God can be explained without God.
Of course because science does not accept the writings of scriptures, science may have been mistaken at points along the way
This presupposes the validity of the scriptures -- without evidence.
... but it is amazing how close science has come to what the scriptures tell us imo.
Examples?
This could be a case in point where science will keep hitting it's head against a wall forever because it does not accept the scriptures.
Again, you're treating the scriptures as axiomatic. You're accepting them without evidence. Science derives its conclusions from facts, observations and testing., not from scriptures.
Science may be able to say that it has worked out possible chemical and physical mechanisms but imo life is more than chemical and physical, it is dead matter becoming conscious.
OK. That's your opinion. But it's not fact based. It's emotional.
Certainly seems more than chemical and physical to me.
And this is an emotional belief that you're comfortable with. It's not fact based.
I could be wrong, maybe life came from the earth as parts of the Bible seem to suggest, but still consciousness is more than chemical and physical except in a science that cannot seem to accept that.
You've retreated from the physical argument to the question of consciousness? Are you saying that consciousness is a special category, that it can't be explained by the same mechanisms as physical features?
On what are you basing this? Isn't this just another example of religion retreating to the boundaries of science?
I don't know how many times. I guess as often as people have thought that particular mysteries would never be explained. People are in religions and religion takes on the scientific paradigm of the era it is in. A mystery solved is a mystery solved to all people, theists and atheists.
Religion does
not accept the scientific paradigm of its age. It rejects it. It fights against it. It's always a step behind.
A mystery solved only becomes a mystery solved for the religious with a great deal of time.