What did trees evolve from?
Did an Apple tree evolve from another tree? Will an Apple tree evolve to something else in a million years?
and why are there beneficial plants. how come all plants aren't harmful to animals/humans? If all plants were poisonous we would have a problem but wouldn't that be beneficial to the plants, helpful to their survival because animals and humans wouldn't be able to eat them? So what reason do evolutionists give? why did plants evolve so they wouldn't be harmful to humans & animals?
Of course there are several questions in biology that are not entirely clear to biologists, but the questions you ask are quite well-agreed upon by scientists.
Yes, apple trees did evolve from other trees. Probably humans have helped evolution a bit, by only selecting the trees that gave the largest (or perhaps the most tastiest) apples for reproduction. So the ancestors of the current day apple tree was probably some tree with smaller apples.
A similar phenomenon can be seen in wheat. Corn is a version of grass that has evolved, with human help, in such a way that it has larger grains than 'regular' grass. For many species of corn, it is still quite easy to see from which species of grass it evolved, because of the striking similarities.
This apple-tree like ancestor of the current apple tree (which according to Wikipedia still grows in Central Asia) will have had some other tree as ancestor. The Wikipedia page on plant evolution ( http://en.wikipedia.org/wiki/Timeline_of_plant_evolution ) seems quite decent in case you would like to know all the details.
The apple tree will not only evolve in millions of years, but also during the current time. By combining 'fathers' and 'mothers' from a different family of apple trees, still new species of apples are created.
What the apple tree will evolve to in millions of years is harder to predict. It might be that the apple tree is extinct by then. It might also be that there will be an entirely new kind of apple tree-like species, or that the present day apple tree still exists. This will mainly depend on the circumstances in which the apple tree will grow (and of those circumstances humankind is probably an important one).
I hope this answered your question! If you have any more questions, don't hesitate to ask.
Besides, I don't think you have to be atheist to subscribe to this point of view. At least in my country (The Netherlands), most Christians believe in evolution theory as well.
That is an interesting question. First of all, do not underestimate the number of harmful plants. If you go to the forest and start eating random plants, you will probably die very, very soon. The reasons humans (or other animals) do not get poisoned often in practice, is because animals are evolved in such a way that they do not like eating plants that are dangerous for them (any species that would enjoy eating poison is doomed to extinct). For example, many poisonous plants have a taste that is perceived as bad-tasting (often bitter) by humans.
I can think of a couple of reasons why not all plants are poisonous:
- It is hard for plants to develop a poison that works against any kind of animal, without poisoning oneself
- Many plants use animals for their reproduction. Think of bees carrying pollen, or animals carrying sticky seeds in their fur. Note that in most plants, the part containing the seeds (fruits/berries) is most tasty - exactly for this reason.
At least to me this seems quite plausible, I don't know how you think about this after reading my reply?
Of course there are no plants that poison themselves, because any mutation that causes a plant to poison itself, would cause the plant to die, so that it cannot reproduce. Probably mutations that causes plants to poison themselves have occurred, but the plants probably died before we could research them. My point was rather that not any poison would work, and plants need the right balance between being poisonous for animals, but not so poisonous that their own system would be disturbed.but there are many plants that are poisonous. don't they also get poisoned themselves? and don't they depend on animals for reproduction?
Of course, plants do not really 'know' anything about this. You can imagine that at a certain point there only existed poisonous plants with non-sticky seeds. Because of a certain mutation, some plant suddenly got sticky seeds. This plant could more easily reproduce itself, because the animals would transport the seeds in their fur, so the plant could spread itself faster than the non-sticky plants (although it wouldn't happen often, because the plant was not attractive for animals because of its toxicity). From this point on, the plant would benefit from being non-toxic, so non-toxic 'children' would spread over the world faster. It is a quite beautiful system, I would say: although all the organisms in nature can be relatively simple and do not need to have explicit 'knowledge' about the organisms that act as their 'friends', still everything works well together.And how did the plants know that animals were necessary for helping them reproduce? They don't have eyes to see that some animal has the seeds stuck in their fur. Likewise how did the flowers know that bees would help them pollinate? how did they know what the bees were doing and that pollin would get stuck to the bees that the bees would then carry to other flowers?
It works the other way around. You can imagine that animals at some point in time enjoyed eating poisonous food. But of course, such animals wouldn't live long. So only the animals that liked healthy food, and disliked poisonous food, would survive and be able to reproduce.Btw why do poisonous plants taste bad? what makes them that way? why couldn't there be sweet-tasting poisonous plants that humans and animals would eat? did the poisonous plant think "lets taste bad so no one would eat us?" how did they know what "bad-tasting" is and that animals wouldn't like such a taste?.
You are more than welcome. Fortunately these are simple questions that science has well-agreed answers on. But don't worry, there are more than enough questions left, for example about the origin of the universe, that science cannot answer and are free to religion to debate onthanks for replying.
Of course there are no plants that poison themselves, because any mutation that causes a plant to poison itself, would cause the plant to die, so that it cannot reproduce. Probably mutations that causes plants to poison themselves have occurred, but the plants probably died before we could research them. My point was rather that not any poison would work, and plants need the right balance between being poisonous for animals, but not so poisonous that their own system would be disturbed.
Of course, plants do not really 'know' anything about this. You can imagine that at a certain point there only existed poisonous plants with non-sticky seeds. Because of a certain mutation, some plant suddenly got sticky seeds. This plant could more easily reproduce itself, because the animals would transport the seeds in their fur, so the plant could spread itself faster than the non-sticky plants (although it wouldn't happen often, because the plant was not attractive for animals because of its toxicity). From this point on, the plant would benefit from being non-toxic, so non-toxic 'children' would spread over the world faster. It is a quite beautiful system, I would say: although all the organisms in nature can be relatively simple and do not need to have explicit 'knowledge' about the organisms that act as their 'friends', still everything works well together.
It works the other way around. You can imagine that animals at some point in time enjoyed eating poisonous food. But of course, such animals wouldn't live long. So only the animals that liked healthy food, and disliked poisonous food, would survive and be able to reproduce.
You are more than welcome. Fortunately these are simple questions that science has well-agreed answers on.
But don't worry, there are more than enough questions left, for example about the origin of the universe, that science cannot answer and are free to religion to debate on
Of course there are several questions in biology that are not entirely clear to biologists, but the questions you ask are quite well-agreed upon by scientists.
Yes, apple trees did evolve from other trees. Probably humans have helped evolution a bit, by only selecting the trees that gave the largest (or perhaps the most tastiest) apples for reproduction. So the ancestors of the current day apple tree was probably some tree with smaller apples.
A similar phenomenon can be seen in wheat. Corn is a version of grass that has evolved, with human help, in such a way that it has larger grains than 'regular' grass. For many species of corn, it is still quite easy to see from which species of grass it evolved, because of the striking similarities.
This apple-tree like ancestor of the current apple tree (which according to Wikipedia still grows in Central Asia) will have had some other tree as ancestor. The Wikipedia page on plant evolution ( http://en.wikipedia.org/wiki/Timeline_of_plant_evolution ) seems quite decent in case you would like to know all the details.
The apple tree will not only evolve in millions of years, but also during the current time. By combining 'fathers' and 'mothers' from a different family of apple trees, still new species of apples are created.
What the apple tree will evolve to in millions of years is harder to predict. It might be that the apple tree is extinct by then. It might also be that there will be an entirely new kind of apple tree-like species, or that the present day apple tree still exists. This will mainly depend on the circumstances in which the apple tree will grow (and of those circumstances humankind is probably an important one).
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