What is the difference between biotic and abiotic factors? How do they interact within an ecosystem?

How do you date a sample of rock that you suspect as being one of the earliest on earth

As studied this week in the cell cycle, we saw how a cell moves through its life with a plan. as you transition from a student at uma to a valued member of your chosen career field, what will you put into place in your life to manage and to fit the new responsibilities of your career into your current life?

You see a white marker with an orange circle and black lettering. what does this marker tell you