The unit is called Ecosystem.
Ecological units comprise concepts such as population, community and ecosystem.
<em>An ecosystem</em> is a community of plans and animals interacting with each other in an particular area. They also interact with their non-living environments (water, earth, sun, soil, climate and atmosphere).
The robins are in relationship with the earthworms because the robins eat them in order to survive and as a part of the food chain. The food chain is a linear sequence of organism through which nutrients and energy pass as one organism eats another. Ecosystems consist of creatures that mutually benefit from each other.
Answer:
Manifest Destiny, a phrase coined in 1845, is the idea that the United States is destined—by God, its advocates believed—to expand its dominion and spread democracy and capitalism across the entire North American continent.
Explanation:
There are three basic themes to manifest destiny: The special virtues of the American people and their institutions. The mission of the United States to redeem and remake the west in the image of the agrarian East. An irresistible destiny to accomplish this essential duty.
The correct answer is A. Slavery must not be allowed to spread to western territories. The Free-Soil Party was a political party in the United States from 1848 to 1852. The main opposition was the expansion of slavery on western territories. The Free-Soil Party believed that free men on free land were a superior system comparing it to slavery, because of the economical opportunities and possibilities. This political party was founded in New York after they denied the endorsement of the Wilmot Proviso law during the Democratic convention in that state; this act would have banned slavery on the newly acquired territory during the Mexican-American war.
The main problem that caused separation within the Democratic Party was the fact that during the New York Democratic convention of 1848, the Wilmot Proviso act was not endorsed. This act would ban slavery in territory acquired by the United States from México after the war. For the dislike of many members of a group called Barnburners –which was the name of two opposing ideas in the New York Democratic Party. The main idea separating both groups was slavery and those who opposed it. The Barnburners were the anti-slavery and the Hunkers were those who approved of slavery.
Though this political party had a short life, its impact in the political scenario was bigger. For one, they presented the American people with two Senators and fourteen Representatives on the 31st Congress from 1849-1851. They also ran with the banner ¨Free soil, free speech, free labor and free men.¨ These were the inspirations of the Free-Soil Party, and its main goal was to prevent the spread of slavery onto western territories.
