Answer:Native specie are species that naturally lives in an ecosystem.They are usually assisted by new species.
Non native specie;These are species that exist outside their natural range.They usually exist where they have not naturally occured and they don't hinder the presence of other specie in the ecosystem.
Indicators are organisms whose existence is largely dependent on the condition of the ecosystem.
Key stone specie;These species have significant impact on their eco system.Non existence of these species can cause significant regress In an ecosystem.
Causes of decline of the listed species.
1)Pathogens and pest.
2)Human causes.
3)Loss of habitat.
4)Loss of pollinators and other plant partners.
Owl as an indicator specie has declined.
Explanation:
Answer:
India is said to be 'an unity in diversity', because there are so many castes, creeds, religions, languages and so on, but in a unique way India continues to be a strong nation state because we are united as a people. There is a proverb,'united we stand, divided we fall'; as long as Indians remain united foreign powers will not be able invade us. It is, therefore, absolutely necessary for the people of a country to remain united for them to be able to prevent foreign invasion.
Explanation:
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<span>A. It established federal emissions standards
</span>The enactment of the Clean Air Act of 1970 (1970 CAA) resulted in a major shift in the federal government's role in air pollution<span> control. This legislation authorized the development of comprehensive federal and state regulations to limit </span>emissions<span> from both stationary (industrial) sources and mobile sources.</span>
Answer:
Geography caused some colonies to become centers of trade, and others to output huge amounts of crops. The Mid-Atlantic colonies used their large rivers, fertile soil and open plains for large scale farming. The crops raised here were oats, wheat, and rye. They also raised livestock.
