30 ! would the exons of dna normally ever be together as a separate dna molecule in a cell without the introns as they were in the shorter sequence you used to find the exons and introns? explain.

They are in almost every human cell and its sequence of nucleotides is different in each one of the them. The DNA fingerprint includes intron because exon are more conserved so they have less variability in their sequence.

The orginal answer is on encyclopedia, I change the wording in order to advoid plagerism. I hope I helped :)

answer; i believe that the correct answer is(d) nondisjunction during meiosis;

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in