True or false; the advice of the physician in and of itself has been shown to be ineffective in increasing smoking cessation rates.

i'd say that the moon rock is about 2.2 billion years old.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.