Does the Theory of Evolution explain...?

Question

why there are some one-celled organisms that haven't evolved into more complex organisms yet?

I want to see creationist answers :)

Answer 1

creation is how everything came to be,not evolution

Answer 2

More complex is not necessarily better. Evolution works on whole ecosystems. Ecosystems would not work without lower forms to provide nourishment through the food chain. But the one-celled organisms of today are not the same as those that existed several million years ago (For the most part - it's kind of complex, but they evolve too, although some can stay in their forms for quite a long time in isolated environments).
So the short answer is if everything evolved at once into more complex organisms, nothing would survive in the end, so the system wouldn't be functional. Also, there are many situations (Such as a drought) where being small and insignificant is an advantage.

Answer 3

Yes.

There's no reason they should.

Microbes have survived because they've been successful (they make up more of the weight of all living things than all the rest put together).

They live in all kinds of environments (including inside us and other critters -- we couldn't live without them).

You don't understand evolution if you think there's some sort of "drive to greater complexity" (a common misunderstanding, even among those who claim to believe evolutionary theory).

Of course, you probably aren't looking for what evolution says, but are only really interested in what people who don't understand evolution have to say.

I'll look back to see what you pick for Best Answer; if your question is sincere, you'll pick an evolution-based answer; if you pick an ID-er, you're just another closed minded "I don't care about truth; I just want to throw a public hissy fit!" crowd.

Answer 4

Yes, it explains it very well. Evolution is based on the simple idea that organisms posses genetic variations. Changes in DNA can lead to increased or decreased fitness. (Fitness is the ability to survive in one's particular environment.) Many single celled organisms are able to survive easily as simple creatures. Since simple organisms can survive, their DNA remains in the gene pool and theose species remain for generation after generation. If a simple organism undergoes a mutation leading to increased complexity, the organism has not increased its fitness because it could have survived without the mutation. For such organisms, having structures of increased complexity just means wasting energy and space with worthless biological equipment. Such an increase in complexity would have either neutral or negative effects on fitness.

Answer 5

It explains that species evolve due to adaptations caused by environmental pressures. If an organism fills a niche in the ecosystem it has no need to evolve.

Answer 6

They have found a niche while others moved on to different forms. Most of our single-celled organismsare quite a bit advanced from the originating forms. I would recommend a course in Biology for more complete infomation, there just isn't enough room here to lay out that much data.

Answer 7

There are plenty of single celled organisms that haven't evolved. If they can survive at there present state why would they evolve. There are also plenty of Christians that haven't evolved either.

Answer 8

The problem with the theory of evolution is it has no firm rules or postualates. It's only 150 years old. It's like PSCHOLOGY, except Psychology actually has testing methods that work reliably.

They can't explain nothing about nothing (although in time maybe they will) and because they can't they get all worked up about it.

It's a lot like religion.

In fact it IS a religion, not a science.

There is no E=Mc2 in Evoltuion.

NOT ONE DAMN algebra equation to explin how it works.

If you can't explain it with MATH it isn't hard science.

If SOMEONE has some ALgEBRA or CALCULUS to SHOW how evolution propegates, please post a link.

I have NEVER seen an equation for propegation.

Answer 9

Yes it does. Each species has its ecological niche. Single celled organisms are best adapted for some niches (such as the single celled bacteria in the lining of your colon).

Answer 10

Because a one celled orgamism is best suited to the particular environment they are in.

You assume that evolution means progression to bigger and better. The only "better" concerns being best in your particular environmental niche. That's all.

Answer 11

Not everything NEEDS to evolve. Some things do just fine the way they are.