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.
Answer:
Finding shelter in caves
Explanation:
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<span>Yes the United States federal government
should reduce the progressive income tax rates in favor of an introduction of a
regressive national sales tax. Hence, since U.S progressive income tax means
income redistribution that most taxes are used to fund social welfare programs
however only a small portion of government spending is devoted to welfare
payments. Example of this progressive taxes reduction is the sales tax. Moreover,
If the two individuals buy the same amount of goods or services, the sales tax
constitute a higher percentage of the lower-earning individual’s wages and a lower
percentage of the higher-earning individual’s wages. </span>
Answer:
The reconstruction era started directly after the civil war and lasted until 1877. President Andrew Johnson was president. This was an effort to reunify a divided nation. Amendments such as the 14th were ratified in this time. Although the Civil War was just won, it is important to remember that slaves were not completely free. There was a process to this and several loopholes were found. Slaves were not yet equal.
Explanation:
Hope this helps :) If you have any additional questions regarding the Reconstruction Era you can ask in the comments and I’ll answer asap
Any practices should best be based on a research - this is the correct answer. (a. child development and research) Research is the best source of actual knowledge, rather than people's best guesses (people's best guesses might lead government regulations, but it would be better if they also followed research results.).
