What is a major source of calcium and sodium in oceans? a. air pollutants b. gases from active volcanoes c. minerals dissolved in aquifers d. weathering and erosion of rocks?

Cells destroy body cells infected by a virus or bacteria.

What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material

Which of the following is a true statement? question 8 options: populations can't evolve, only individual organisms. individuals have adaptations that can change over time. individuals have traits that may or may not make them successful at reproduction. individuals evolve to have adaptations.