The Earth has spheres that are constantly interacting. Which of the following is the best example of the geosphere interacting with the biosphere? A. Volcanic ash provides nutrients in the soil for plants. B. A strain of bacteria is able to live deep in an ocean. C. Some land mammals are dependent on ice formations. D. Strong winds carry pollen across large fields to flowers.

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.