Yellowstone national park has an average of about 4500 bison living in it. the park covers 3472 square miles. what is the population density of bison living in yellowstone? a. 1.3 bison/mi b. 16 bison/mi c. 77 bison/mi d. 0.77 bison/mi (these are all squared, btw)

The model illustrates a process by which a substance is taken up by a cell

Imagine that certain laws of physics could be ignored and you were able to travel vast distances in moments. now imagine that you traveled to an earth-like planet located light-years away that is known to support life. think about what you’ve learned in this unit and make an argument for what you think would be the dominant type of life form on this planet. consider whether a notochord is required for an organism to manipulate its environment and become a dominant creature.

Long term exposure to waves can cause sunburns and skin cancer.