Disease, competition, and predation.
the answer is their cells grow more rapidly than the surroundings cells
Structurally, DNA and RNA are nearly identical. However, there are three fundamental differences that account for the very different functions of the two molecules. RNA has a ribose sugar instead of deoxyribose sugar like DNA.
"Introduction of non-natives always cause great harm to the environment." Non-natives don't always cause damage and/or harm.
