If a major portion of a population leaves for a new territory, what happens to the gene pool of the original population?
It stays the same, no alleles are lost.
It will always increase due to mutations.
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It is decreased; alleles are lost.
Both populations will always become new species.

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

In each transformation of energy , some energy what?