Answer:
A rift valley is formed from a divergent plate boundary, a crustal extension or spreading apart of the surface, which is subsequently further deepended by the forces of erosion.
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Answer:
The population will increase
Explanation:
In a given year if a country has more births than deaths, that means that there will be an increase in the total amount of people a country has. If this trend continues the population will grow in the future. If the birth rate is substantially higher than the death rate than the population will increase more rapidly, and more substantially. If the birth rate is only slightly greater than the death rate the population will still increase, albeit more slowly, and less substantially.
Answer:
An analysis of 5,000-year-old genetic material from preserved human remains found in Sweden suggests that people moving from southern to northern Europe spread agriculture across that continent long ago.
In addition to agricultural know-how, the intrepid farmers brought their genes: They interbred with hunter-gatherer communities to create modern humans living in Europe today.
"Genetic variation of today's Europeans was strongly affected by immigrant Stone Age farmers, though a number of hunter-gatherer genes remain," study researcher Anders Götherström, of Uppsala University in Sweden, said in a statement.
The results of this study, to be published in the April 27 issue of the journal Science, match up well with previous archeological evidence of farming in Europe.
Explanation:
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