AK- I have ALWAYS tried to see if that were true. It isn't.
Simply because other religions have some similarities- SOMETIMES- does NOT mean the Bible writers pulled ideas from them.
Let's start with an example; the Origin of Man.
We all know the current and ridiculous THEORY of Evolution, where we, essentially, made ourselves- the result of endless impossibilities stacked upon one another. It's even more absurd than the beliefs of past peoples, where, the Sumerians (Ubadians?) believed Gods were battling, and a drop of their blood became the first man, etc.
Now we have Genesis, where God forms the man from the ground, and empowers him with life- and a wife that evolution can't account for, and the human family begins (is documented), Genetics confirms there was an original couple, the sciences studying languages, race, and civilizations show us all braching back to one- instead of evolution popping up a man here, and a man there...