==OK, where in Genesis does it say 6 consecutive days?
After each day, there was evening, and then there was morning, which began the next day. C-Y-C pretty much covered your Cain question. But beyond that, Jesus said He created us male and female right from the beginning, and the Bible says death did not enter the world until Adam and Eve sinned (both of which you failed to address). I would say each one of these rules out evolution, but when taken together, God’s Word most definitely renders evolution impossible.
To follow up on what GGG said, a further reason for opposition to evolution is that if we deny what Jesus said when referring back to Adam, we are implying that He is a liar. If He were to be a liar, He could not be our Savior.