The period of human evolution has coincided with environmental change, including cooling, drying, and wider climate fluctuations over time. How did environmental change shape the evolution of new adaptations, the origin and extinction of early hominin species, and the emergence of our species, Homo sapiens? (‘Hominin’ refers to any bipedal species closely related to humans – that is, on the human divide of the evolutionary tree since human and chimpanzee ancestors branched off from a common ancestor sometime between 6 and 8 million years ago.)
How do we know Earth’s climate has changed? How quickly and how much has climate changed? One important line of evidence is the record of oxygen isotopes through time. This record of δ18O, or oxygen stable isotopes, comes from measuring oxygen in the microscopic skeletons of foraminifera (forams, for short) that lived on the sea floor. This measure can be used as an indicator of changing temperature and glacial ice over time. There are two main trends: an overall decrease in temperature and a larger degree of climate fluctuation over time. The amount of variability in environmental conditions was greater in the later stages of human evolution than in the earlier stages.
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Civil rights are an essential component of democracy. They guarantee equal social opportunities and protection under the law, regardless of race, religion, or other characteristics. Examples are the rights to vote, to a fair trial, to government services, and to public education.
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Fifty years of effort by suffragists secured approval of the Nineteenth Amendment.
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Herbert Hoover felt that a key part of the American spirit was rugged INDIVIDUALISM people’s belief in their own responsibility and power.
Answer: A
Explanation:Lenin promised the people of Russia a number of things. The first was that he would pull Russia out of the war. This proved extremely popular especially among soldiers. Secondly he promised land to the peasants.
