which of the following statements about light in aquatic environments is false 1
ID: 152522 • Letter: W
Question
which of the following statements about light in aquatic environments is false 1. 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 byExplanation / Answer
1.
Answer: E: The quantity and quality of light have little influence on vertical temperature profiles of water bodies.
Reason: All other reasons satisfy, whereas vertical temperature has no effect over light and light penetration into water bodies. Because light gets diffracted, deflected and reflected number of times before reaching the surface of water, where the temperature will only help in evaporation of water but not disturb the light penetration. Measure of heat has no effect over light intensity, heat can also sustain without light.
2.
Answer: E. Thermocline
Reason: A thermocline is a skinny layer in a huge body of water in which temperature modifications happens swiftly with intensity within the thermocline region. Temperature decreases unexpectedly from the combined upper layer of the ocean to plenty chillier deep water inside the thermocline.
3.
Answer: D. Rivers and Streams are rarely oxygen depleted.
Reason: Fast moving water, such as river and streams, tends to comprise large amounts of oxygen, while stagnant water carries less. This is because oxygen consuming micro-organisms are found to thrive in stagnant water rather than moving water. Ex: Bacteria, phytoplankton’s, etc..,
4.
Answer: The type of sediments in the bottom of a river or stream is primarily influenced by moving action of rain water (physical weathering). The moving water might be the action of rain bringing down soil and sediments from hills and slopes into a stream or river, or could also be due to the geological action caused due to moving water such as land slide, mud flow, and much more.
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