The military was weak, to weak to fend off the Viking invaders and protect the Mother-Country
The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" in 1859, is the process by which organisms change over time as a result of changes in heritable physical or behavioral traits. Changes that allow an organism to better adapt to its environment will help it survive and have more offspring.
Evolution by natural selection is one of the best substantiated theories in the history of science, supported by evidence from a wide variety of scientific disciplines, including paleontology, geology, genetics and developmental biology.
The theory has two main points, said Brian Richmond, curator of human origins at the American Museum of Natural History in New York City. "All life on Earth is connected and related to each other," and this diversity of life is a product of "modifications of populations by natural selection, where some traits were favored in and environment over others," he said.
Answer:
Henry Clay wrote the 5 bills of the Compromise of 1850
John Brown raided Harpers Ferry
Stephen Douglas introduced the Kansas-Nebraska Act
Harriet Tubman participated in the Underground Railroad
Explanation:
I knew from mind that Harriet Tubman did the Underground Railroad things and the rest i looked up sorry :( i also needed help
