If the half-life of uranium-235 is 700 million years and you have 16 atoms of it, how many half-lives
(700-million-year units of time) will pass before only
1 atom of uranium-235 is left?
A. 7
B. 6
C. 5
D. 4
SUBMIT

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

If your blood becomes too concentrated with iona, what will happen to the red blood cells

What are the proteins in connectivity tissues of your foot examples of?