Answer: D- a mechanism for evolution
Explanation: The mechanism for evolution refers to the changes in allele frequencies within a single population.
There are four fundamental forces of evolution: Natural Selection, Genetic Drift, Mutations and Gene Flow
One of the main controversial issues in population genetics is concerned with the relative importance of both mechanisms in determining evolutionary changes
Answer:
ok so I'm just gonna give you Info about it.
Explanation:
The westward expansion of slavery was one of the most dynamic economic and social processes going on in this country. The westward expansion carried slavery down into the Southwest, into Mississippi, Alabama, crossing the Mississippi River into Louisiana. ... Without slavery, you could not have civilization, they said.
During this crucial period, the United States pursued a policy of expansion based on “manifest destiny,” the ideology that Americans were in fact destined to extend their nation across the continent. The United States even proved to be willing to go to war to secure new territories.
Expansion (1820-1849) During the early 1800's, settlers moved westward over the Appalachian Mountains into the new states and territories. ... Americans also settled in the Oregon Country, a large territory between California and Alaska claimed by both Britain and the United States.
To Jefferson, westward expansion was the key to the nation's health: He believed that a republic depended on an independent, virtuous citizenry for its survival, and that independence and virtue went hand in hand with land ownership, especially the ownership of small farms.
Factors that contributed to America's westward expansion in the later half of the 19th century included the quelling of Native American resistance and relocation of tribes to reservations, gold rushes (in Colorado, California, and the Black Hills of South Dakota) and the building of the Intercontinental Railroad.Jun 24, 2018
Answer:
Sperry received the 1981 Nobel Prize in Physiology or Medicine for his split-brain research. Sperry discovered that the left hemisphere of the brain was responsible for language understanding and articulation, while the right hemisphere could recognize a word, but could not articulate it.
Research suggest that Della will: <span>continue to ask for a treat every time she foes to the store
When the mother granted Della's every request, she created a milestone about Della's maximum reward everytime della goes to the store.
This will set Della's expectation to achieve that maximum reward everytime della is around that familiar environment</span>
