A400-gram sample of a radioactive nuclide is left to decay for 30 hours. at the end of 30 hours, only 200 grams of the sample is left. what is the half-life of the nuclide sample

a) 10 hours
b)1.5 days
c) 30 hours
d) 0.5 hours

Differentiation of cells changes the nucleic information. true false

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.