D because they are complete systems
<span>Eukaryota i think this is the right answer
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two factors that determine range are,
in constant flux as abiotic and biotic
factors change overtime Abiotic factors - temperature, rainfall, the presence
of geographical structures like mountains and oceans, and large scale ongoing
and historical process such as continental drift Biotic factors - past and
current presence of other species that provide habitat, food, or competition Ranges
are dynamic
Question/Purpose
research
Hypothesis
Experiment
collect data and analyze
Conclusion
Answer:
The pollution present in the air is primarily categorized as chemical, physical and biological sources, apart from this it is also categorized as natural and anthropogenic sources of pollution. The anthropogenic sources of pollution are caused mainly due to human activities, that is, these are the man-made sources of pollution.
The anthropogenic pollution arises due to deforestation, burning of fossil fuels, discharges originating from the industries, fertilizers, and pesticides, etc. The prime anthropogenic pollutants present in the air originate due to the combustion of fossil fuels. In the United States, the three prime anthropogenic sources of gaseous air pollutants are transportation, industry, and production of energy.
