Sand is . A. Element
B. Composite
C. Homogeneous mixtures
D. Heterogeneous mixtures

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

4. if a cell is placed inside a solution that has a higher concentration of solute than on the inside of the cell, what can be said about the movement of water? a. water will move out of the cell, causing it to shrivel. b. water will move in and out of the cell at the same rate. c. water will move out of the cell, causing it to swell. d. water will move into the cell, causing it to swell.