Yes, they do have to dissapear, if they don't then they didn't evolve.The biggest misconcepion about evolution is that there are missing links of any kind. There are no transitional species and everytime they claim they have found one, it turns out to be something else. The horse line that used to be found in books, is all fake, among other things, has been proven to be so and the little creature that is supposed to be the earliest horse isn't really a horse and never "evolved into one". Evolution will be one of the greatest stains on science some day, when the people trying to perpetuate this myth finally come to their senses and start once again to be scientific. If you doubt my word read about the Cambrian explosion and answer the questons posed by that phenomonon, questions no evolutionists has been able to answer, and you will solve some riddles. Thanks...
Huh? Some species can remain mostly unchanged for long periods of time. Look at sharks or alligators. A species can give rise to another species but still continue to survive afterwards. Wasps evolved from ants, but ants are still around.
There are no transitional species and everytime they claim they have found one, it turns out to be something else.
Give evidence for your claim (hint: there is none).
The horse line that used to be found in books, is all fake, among other things
Sigh. The Smithsonian Museum of Natural History disagrees with you.
This reveals a startling ignorance about evolution.
There are any number of residual species, from horseshoe crabs, to crocodiles, to cockroaches to frogs, that have been relatively comfortable in their niches for millions of years, while certain portions of the population became isolated in more hostile environments that forced them to evolve while their ancestors did not. For example, the eyeless, white snakes and crickets that live deep in caves, many of which are distinct species, yet are traceable to their above ground relatives, which haven't changed in millenia.
If you doubt my word read about the Cambrian explosion and answer the questons(sic) posed by that phenomonon.
The Burden of Proof is upon you to come up with another reason for that fossil record aside from evolution, other than God was just trying to fool everybody as to the origins of life. Whether it was a burst of radiation from a nearby (relatively) nova or a drastic environmental change that drastically increased the food supply and greatly expanded the number of niches, or both at the same time, is irrelevant. The fact that you acknowledge there was a Cambrian explosion is tacit admission you accept that validity of the fossil record and all it implies. And the only thing it implies is evolution.