What impact does sunlight have on the marine environment? a light from the sun shows animals where they need to migrate. b sunlight makes colors more visible, improving animal communication. c the heat from the sun increases the temperature of the water. d the water temperature is kept constant throughout different depths due to the sun.

In which of the following relationships is one organism always benefited while the other organism is always harmed

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

Kidney stones are tiny crystals of calcium or magnesium that block the narrow sections of the excretory system. which symptoms would a person with kidney stones experience? a. inability to store urine; pain in the bladder b. inability to store urine; pain in the urethra c. reduced urine flow; pain in the bladder d. reduced urine flow; pain in the urethra