Answer:
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<span>The Mexican metallogenetic provinces map shows a wide variety of minerals (Fig.3) which include among others: gold, silver, copper, zinc, lead, molybdenum, manganese, fluorite, titanium, coal salt, sulfur and iron.</span>
There are a few Presidents that did not have a Vice President.
John Tyler / 1841 - 1845 - no Vice President
Millard Fillmore / 1850 - 1853 - no Vice President
Andrew Johnson / 1865 - 1869 - no Vice President
Chester A. Arthur / 1881 - 1885 - no Vice President
There are Presidents that have gone their terms without a Vice President, but listed above are the ones that never had one.
Answer:
Directional selection; stabilizing selection
Explanation:
- The stabilizing selection is a result of the decrease of the population and causes genetic variation due to the natural selection.
- The directional selection of the genetic variation shifts to a new phenotype and on exposure to the environmental changes and both of these can lead to the natural selection and contribute to the variation of the population.