_____ 1. At certain locations in the world’s oceans, Ulva lactuca overpopulates due to “nutrient loading” from surrounding land and sewage outfalls. Compounds containing which elements most likely lead to the overgrowth of sea lettuce?
a. mercury
b. nitrogen
c. potassium
d. sodium
_____ 2. When large mats of sea lettuce die, their decomposition leads to
a. an overpopulation of fish
b. increased photosynthesis
c. a cleansing of the sea water
d. a lack of dissolved oxygen
_____ 3. Some coastal regions affected by the overpopulation of Ulva are carrying out “harvesting” programs that will remove large mats of sea lettuce from the water. (See map) This approach will have only limited success at solving the problems associated with too much sea lettuce because harvesting the sea lettuce:
a. does not address the cause of its growth
b. will only make the lettuce grow faster
c. prevents it from decomposing
d. will remove nutrients from the water
a. mercury
b. nitrogen
c. potassium
d. sodium
_____ 2. When large mats of sea lettuce die, their decomposition leads to
a. an overpopulation of fish
b. increased photosynthesis
c. a cleansing of the sea water
d. a lack of dissolved oxygen
_____ 3. Some coastal regions affected by the overpopulation of Ulva are carrying out “harvesting” programs that will remove large mats of sea lettuce from the water. (See map) This approach will have only limited success at solving the problems associated with too much sea lettuce because harvesting the sea lettuce:
a. does not address the cause of its growth
b. will only make the lettuce grow faster
c. prevents it from decomposing
d. will remove nutrients from the water