The basic units of structure in all living organisms are the what? is it organelles , chromosomes , or cells.

Which ocean is on the eastern coast of north and south america? arctic ocean indian ocean pacific ocean atlantic ocean

18. over time, how do sand dunes tend to migrate? a. perpendicular to the movement of the wind b. in the same direction as the wind blows c. toward the wind d. in random directions

What happens when a scientific theory is shown to be an accurate description of a phenomenon?