The mesopelagic zone refers to the ocean depths in which there is

May 21st, 2016
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Question 1 of 25 The mesopelagic zone refers to the ocean depths in which there is enough light to support plant growth. no light at all. dim light, but not enough for plant growth. enough light for primary production by bacteria. dim light, but enough to support only some hardy plants. Question 2 of 25 Where is the main thermocline located? In the mesopelagic. Above the mesopelagic. Below the mesopelagic. It varies since the thermocline disappears in the tropics. It varies since the thermocline moves up and down in the water column depending on the amount of oxygen. Question 3 of 25 Photophores are specialized eyes. buoyancy-regulating organs. specialized jaws. light-sensitive organs that lack the lens of true eyes. light-producing organs. Question 4 of 25 Which of the following is not true regarding the deep-scattering layer (DSL)? Its position rises at night and moves down during the day. It is comprised of fish, shrimp, squids and jellyfish. It is found at depths of 300-500 meters.

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BIO145 - The mesopelagic zone refers to the ocean depths in which there isQuestion1 of 25The mesopelagic zone refers to the ocean depths in which there isenough light to support plant growth.no light at all.dim light, but not enough for plant growth.enough light for primary production by bacteria.dim light, but enough to support only some hardy plants.Question2 of 25Where is the main thermocline located?In the mesopelagic.Above the mesopelagic.Below the mesopelagic.It varies since the thermocline disappears in the tropics.It varies since the thermocline moves up and down in the water column depending on the amountof oxygen.Question3 of 25Photophores arespecialized eyes.buoyancy-regulating organs.specialized jaws.light-sensitive organs that lack the lens of true eyes.light-producing organs.Question4 of 25Which of the following is not true regarding the deep-scattering layer (DSL)?Its position rises at night and moves down during the day.It is comprised of fish, shrimp, squids and jellyfish.It is found at depths of 300-500 meters.It was discovered by sonar.Its position is deeper on nights with a new moon.Question5 of 25The tubular eyes of some mid-water animals are adapted forincreasing the field of vision.producing light.seeing in the complete absence of light.sensing changes in depth.sensing changes in salinity.Question6 of 25The presence of bioluminescent organs on the underside of mid-water fishes is involved incountershading.

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