Blue eyes are recessive in humans if 20% of the population has blue eyes. What is the frequency of the heterozygous individuals in this population?
a. 0.50
b. 0.31
c. 0.55
d. 0.45

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.

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