If three half lives have passed since a scientist collected 100 grams of sodium 24 , how much Na-24 is left now? 0 grams
24 grams
50 grams
12.5 grams
100 grams

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

the dna of humans and mice is almost 92% similar. this similarity indicates that . mice have a tail, while humans have a tailbone. the tailbone is a structure in humans.yes it's true.

cell division is not regulated in tumor cells.

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.