If an isotope's half life is 2 months, and it starts with 240 grams. How many half life's does it take to only have 15 grams left?
2
4
6

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: