Answer: One difference is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not. Another difference is that eukaryotic cells have many membrane-bound organelles while prokaryotic cells have no membrane-bound organelles.
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I would say energy myself, and this is because energy plays a key role in all of these. With trophic levels energy is being transferred amongst the levels. Food chain's is a map of how the energy is passed along the chain. Food web is a web of how energy is transferred, and this is why I would say energy is a keyword.
Answer:
An invasive species is an organism that causes ecological or economic harm in a new environment where it is not native.
Explanation:
Invasive species can harm both the natural resources in an ecosystem as well as threaten human use of these resources. An invasive species can be introduced to a new area via the ballast water of oceangoing ships, intentional and accidental releases of aquaculture species, aquarium specimens or bait, and other means.
Invasive species are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats. This can result in huge economic impacts and fundamental disruptions of coastal and Great Lakes ecosystems.
Answer:
From the 16th to the 18th centuries, an estimated 12 million Africans crossed the Atlantic to the Americas in the trans-Atlantic slave trade. Used on plantations throughout the United States, Latin America and the Caribbean, enslaved Africans were shipped largely from West Africa. With an average life span of five to seven years, demand for slaves from Africa increasingly grew in the 18th century leading traders to take their supply from deep within the interior of the continent
Explanation:
Slave parents, in turn, sought to instill in their children a sense of loyalty to the slave community as a whole. They taught children to refer to other girls and boys as sister and brother
