Which of the following is not an effect of erosion on lakes? a. water leakage b. wearing away of sides c. increased water levels d. basin filling with sediment

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

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

The long-term increase in the average temperature on earth is referred to as _[blank]_. global cooling ozone cooling global warming ozone warming