i wondered if someone coudl help me with these problems from AAMC VI. (That test killed me, especailly the verbal) bio #175: how could an exogenous gene introduced into a somatic cell be passed on to offspring? i thought that this only occured with germ cells were altered. bio #176: UGH? i thought that all cells had the same DNA, but that expression differed from cell to cell. the answer to this quesiton says that different cells contain different genes. okay...last one... physics #128: how many grams of Lead(II) iodide are present in 100ml of a saturated solution. i know this is easy, but i'm dumb. thanks everyone.