Evolution is just a theory – a guess with no evidence
The problem with this argument is unfortunately so simple it often gives me a headache when arguing it; a theory in biology is not the same as a theory in every day life, it has a different definition:
Scientific theory falls under this definition:
1. A set of statements or principles devised to explain a group of facts or phenomena, especially one that has been repeatedly tested or is widely accepted and can be used to make predictions about natural phenomena.
Whereas most religious apologists seem to equate it to these definitions:
4. Abstract reasoning; speculation: a decision based on experience rather than theory
6. An assumption based on limited information or knowledge; a conjecture.
Definitions Source: http://www.thefreedictionary.com
There are literally libraries and museums full of evidence for evolution which (obviously I can’t put it all on here). A lot of clear concise evidence is provided in the following link: http://www.talkorigins.org/faqs/comdesc/section4.html