Food enters the human body through the and leaves through the .

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

What drives an advertising campaign?

Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?