[LiberalGunNut]

Here's the gist in layman's terms; scientists have fruit fly A, a female.

They breed fruit flies B and C from that single female.

They seperate fruit flies B and C. Let's say that Fruit FLy B has a slight mutation.

The generations from fruit flies B and C eventually evolved to the point that they were unable to interbreed.

In other words, the ancestors of fruit fly B and C couldn't make babies even though they both came from fruit fly A. The generations birthed from Fruit Fly A branched off into two seperate species.

That is evolution plain and simple.

[My2Cents]

Two different species of fruitflies. But one never sees the emergence of, say, a bird or a mammal from the offspring of either Fruitfly B or C.

[jim35]

"In other words, the ancestors of fruit fly B and C couldn't make babies even though they both came from fruit fly A. The generations birthed from Fruit Fly A branched off into two seperate species."
"That is evolution plain and simple."

Were they still fruit flies?

[Verax]

Let's say that Fruit FLy B has a slight mutation.

Mutations are harmful (degenerative)and don't result in improvements...

Geneticists have been breeding fruit-flies for sixty years or more in labs all round the world...flies which produce a new generation every eleven days-they have never yet seen the emergence of a new species or even a new enzyme.

[joseph20]

The generations from fruit flies B and C eventually evolved to the point that they were unable to interbreed.
...

That is evolution plain and simple.

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Fruit flies in group B are still fruit flies.

Fruit flies in group C are still fruit flies.

That they cannot interbreed does not show proof of "evolution plain and simple".

For "evolution plain and simple" I would expect to see proof of a fruit fly evolving into a bumble bee or some other completely different animal.