Question

in the arctic ocean, there are very few large aquatic plants. which of the following best explains why?
sea ice decreases the salinity of the water to a level not suitable for plants.
plants have a difficult time surviving due to long periods of darkness.
plants are unable to attach to the deep sea floor.
currents are too strong for plants to survive.
question 19(multiple choice worth 4 points)
(04.05 mc)
which of the following best describes environmental parameters that should be examined before a city can build a landfill?
how close the landfill will be to major cities and highways
whether there will be sufficient staff available to operate the landfill
if leakage from the landfill will be able to contaminate groundwater
what the costs involved in maintaining the landfill will be

Explanation:

For the first question:

• Sea ice does not decrease salinity to a non - plant - suitable level. In fact, when sea ice forms, it leaves salt behind in the water, increasing salinity in the surrounding water.
• Aquatic plants in the Arctic Ocean are not mainly affected by being unable to attach to the deep - sea floor as many are planktonic or have other attachment mechanisms.
• Ocean currents in the Arctic are not extremely strong in a way that would prevent most plant life.
• However, the Arctic has long periods of darkness (polar nights) which limits photosynthesis, making it difficult for plants to survive.

For the second question:

• How close the landfill is to major cities and highways is more of a logistical and accessibility factor rather than an environmental parameter.
• Sufficient staff availability is a human - resource and operational factor, not an environmental parameter.
• Costs involved in maintaining the landfill are a financial factor.
• Leakage from the landfill contaminating groundwater is an environmental parameter as it affects the quality of a natural resource (groundwater).

Answer:

1. Plants have a difficult time surviving due to long periods of darkness.
2. If leakage from the landfill will be able to contaminate groundwater.