subject
Biology, 22.04.2021 17:00 ayanerzg

Nutrients, such as nitrogen and phosphorus, are essential for plant and animal growth, but the overabundance of certain nutrients in water can cause a number of adverse health and ecological effects. About 78% of the air that we breathe is composed of nitrogen gas, and in some areas of the United States, particularly the northeast, certain forms of nitrogen are commonly deposited in acid rain. Although nitrogen is abundant naturally in the environment, it is also introduced through sewage and fertilizers. Chemical fertilizers or animal manure is commonly applied to crops to add nutrients. Wastewater-treatment facilities that do not specifically remove nitrogen can also lead to excess levels of nitrogen in surface or groundwater. An excess of nitrogen in ponds and lakes can cause overstimulation of growth of aquatic plants and algae. The proliferation of these plants in a contained body of water has other secondary effects on the plant and animal life. They include all BUT ONE of the following conditions: A) The amount of dissolved oxygen drops below normal levels, resulting in fish kills.

B) Rapidly moving water, such as in a stream or river, tends to contain a lot of dissolved oxygen.

C) Excess organic material in lakes can cause eutrophication, which is an oxygen-deficient situation.

D) Decreased respiration efficiency of fish and aquatic invertebrates, leading to a decrease in animal and plant diversity.

ansver
Answers: 2

Another question on Biology

question
Biology, 22.06.2019 09:30
The “ecological footprint” left by a citizen of a developed nation is about four times larger than that left by a citizen of a developing nation. why is this the case?
Answers: 1
question
Biology, 22.06.2019 18:30
How are primary producers important to the alligator's energy supply
Answers: 1
question
Biology, 22.06.2019 21:00
A. describe the scientific method, using pasteur's swan-necked flask experiment as an example.
Answers: 1
question
Biology, 22.06.2019 22:10
Select all the correct answers. for a claim about the natural world to be considered scientific, what attributes must it have? a). it must be open to modification if new evidence doesn't completely support it. b). it must be based on scientific observations that can be repeated in a controlled setting. c). it must be applicable to future events and occurrences. d). it must be consistent with only a small portion of relevant observations or data.
Answers: 2
You know the right answer?
Nutrients, such as nitrogen and phosphorus, are essential for plant and animal growth, but the overa...
Questions
question
Health, 09.04.2021 20:40
question
Mathematics, 09.04.2021 20:40
question
Mathematics, 09.04.2021 20:40
question
Mathematics, 09.04.2021 20:40
question
History, 09.04.2021 20:40
question
Mathematics, 09.04.2021 20:40
question
Mathematics, 09.04.2021 20:40
question
World Languages, 09.04.2021 20:40
Questions on the website: 13722362