Half life question: The table below shows the initial and final masses of a radioactive material whose half-life is 15 years. Initial mass (in kilograms) 0.8
Final mass (in kilograms) 0.05

Based on the table, which of these conclusions is correct?
A) The material decayed from 0.8 kilograms to 0.05 kilogram in 60 years.
B) The material decayed from 0.8 kilograms to 0.05 kilogram in 30 years.
C) The mass of the material was 0.1 kilograms after four half lives.
D) The mass of the material was 0.1 kilograms after five half lives.

i'm gonna put a couple so you can chose from

explanation:

if you know the fur color of the offspring mice, you can use the ratios to identify the genotypes of the parents.

if either parent mouse passes a dominant allele, the offspring will have black fur.

if the parental mice has two different fur color (i.e white and black) , the color of the offspring's fur would be either black, white, or the combination of both (grey)

hope this : )

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.