The term BOD (Biological Oxygen Demand): Group of answer choices is a measure of the organic matter and other oxygen-demanding wastes in a)a lake or stream. b)is the highest after a person eats a candy bar c)is defined as the amount of oxygen needed by fish to survive. d)is defined as the number of organisms that need oxygen in a stream.

Q: List the two sources of dissolved oxygen in a lake

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Q: What is the main way that living organisms contribute to the water cycle?

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Q: Please select the correct sequence of steps involved in the creation of a dead zone in a water body.…

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Q: What % of CO2 is absorbed by the oceans from burning fossil fuels?

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Q: What does the failure to sustain water availability underground has resulted?

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Q: What significant role does the water cycle contribute in an aquatic environment?

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Q: Explain the concepts cycling and nitrogen circulation in brief?

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Q: Where is the majority of available phosphorus found on planet Earth? Why is that a concern?

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Q: Examine the figure below and answer the following questions using the letters below (type, A, B, C,…

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Q: Which of the following is the ultimate energy source for the organisms (particularly the tubeworms)…

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Q: Compare environmental, economic, & social effects of large-scale algal oil production?

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Q: The graph shows how dissolved 02 and CO2 levels changed in a pond over a 24-hour period. What caused…

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Q: How is atmospheric carbon dioxide different than carbon emissions?

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Q: 1. describe key aspects of the atmosphere related to human well-being, such as oxygen's role as a…

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Q: List three ways that organisms serve as important means of chemical transport within or between…

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Q: If no photosynthesis or biological pump operated in the ocean, what would likely happen to the…

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Q: What are some nonrenewable resource in our biological system ?

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Q: You are testing a sample of water from a nearby lake that has very few fish living in it and you…

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Q: What are the consequences of using water from ponds and rivers to cool industrial processes? What…

A: Pollution refers to the change in the constitution of any environment i.e. water, land, and air…

Q: What is pollution?

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Q: Which of has following group of gases contribute to the 'Green House Effect' ? Carbon tetrafluoride…

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Q: Water Cycle: Condensation, Evaporation, Runoff, Transpiration, Precipitation, Infiltration 1) Snow,…

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Q: Which graph best represents the relationship between the amount of pollutants in the air and the…

A: Air pollution is the presence of particulate matter in the environment that are destructive to the…

Q: Which of the following would lead to a DECREASE in atmospheric methane concentration?

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Q: Use the words obligate, facultative, aerobic, anaerobic, autotroph, and heterotroph to describe the…

A: organism they may be auto or heterotrophs and aerobe and anaerobe depend on their type of…

Q: the space required for wind energy worth it?

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Q: The most abundant constituent of atmospheric air is ? Oxygen Hydrogen Carbon Nitrogen

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Q: Based on the graph, at what depth do we find the thermocline of this lake? Thermocline in a…

A: The graph depicts the relationship between temperature and the depth of stratified lake.

Q: What are the effects of air pollution on climate? Explain.

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Q: Describe three pathways for the utilization of atmospheric nitrogen. Is human activity a significant…

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Q: What do you think are the multiple stresses that aquatic environments are exposed to? Where do these…

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Q: Why must autotrophic organisms also respire or ferment in addition to fixing CO2?

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Q: If space exploration revealed a planet that had the water, sunlight, and climate, necessary to…

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Q: Why can’t marine organisms use the nitrogen gas dissolved in seawater?

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Q: What is smog? How does ground-level ozone form? What are the adverse effects of ozone on human…

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Q: Few synthetic organic chemicals are dangerous in the very low concentrations in which they enter the…

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Q: Which level of pollution would you invest time and resources into restoring, and why?

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Q: What has changed in the world that has resulted in the drastic increase of carbon dioxide levels in…

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Q: What is eutrophication? How do agriculture, sewage, and use of detergents contribute to the process…

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Q: a) What substances can make water in lakes and ponds hard?   b) Are these substances generally…

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Q: Diagram carbon and sulfur flux in a Winogradsky column

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Q: what is the most important source of water on Earth?

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Q: What is the environmental impact of carbon dioxide emissions?

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Q: Which gas contributes maximum to green house effect on earth?

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Q: How is it that some organisms can survive in such harsh environments? Provide two specific examples.

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Q: Which of the following best describes a decomposer a.An organism that feeds on biological remains…

A: Decomposers assume a significant part in each biological system. Without decomposers, dead life…