Which of the following statements about light in aquatic environments is false? a. less light reaches a particular depth during winter, in the morning, and in the evening because sunlight strikes the water at a lower angle. b. increased levels of particulate matter decrease the amount of light reaching a particular depth. c. pure water absorbs light, so even the purest water would eventually filter out all light at extreme depths d. the amount of light reaching a particular depth influences the amount of productivity. e. the quantity and quality of light have little influence on vertical temperature profiles of water bodies. 2. the region of rapid temperature change in deep bodies of water is called the a. epilimnion b. halocline c. picnocline d. hypolimnion e. thermocline 3. which of the following statements about oxygen in aquatic environments is false? a. during fall turnover in lakes and ponds, oxygen levels are replenished in deep water. b. the oxygen saturation value is greater for cold water than for warm water. c. diffusion of gases is 100 times slower in water than in air, d. rivers and streams are rarely oxygen-depleted. e. during summer, oxygen may become stratified in lakes and ponds, with greater oxygen concentrations in surface waters. 4. the type of sediment found on the bottom of a river or stream is primarily influenced by