Approximately, how many national parks are there in the United States?
a. 25
b. 50
c. 120
d.474

Nucleic acid certain protein cell membranes certain carbohydrates

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?

Which set of terms best describes a community of miners who live out in the countryside of west virginia and use specialized geographical equipment to analyze the composition of rocks