Which of the following statements best describes how endemic diseases impact a nation’s population? A. Endemic diseases can resu
lt in decreasing population numbers: many people die from diseases, and others move away from or avoid moving to places where diseases are rampant. B. Endemic diseases can result in increasing population numbers: people living in areas where certain diseases are prevalent tend to have more children because there is a risk that some will die. C. Endemic diseases can result in decreasing population numbers: people living in areas where certain diseases are prevalent tend to have fewer children. D. Endemic diseases can result in increasing population numbers: areas where certain diseases are prevalent attract more medical professional and researchers who move to these areas for jobs.
Your answer would be, Letter (A), <span>Endemic diseases can result in decreasing population numbers: many people die from diseases, and others move away from or avoid moving to places where diseases are rampant.
The true statement is - Sympatric speciation only occurs in areas where there is local variation in environmental resources
Explanation:
Sympatric speciation means the evolution of new species from an ancestor species which are occupying in the same area and no geographical barrier takes place.
Overlapping of ranges takes place to the organism and old and new species are living i the same geographical region.
A dam diving a fish population could lead to allopatric speciation where geographical barrier causes formation of new species which are completely different from their ancestor species.
1. Compaction occurs where pressure is placed on loosely packed sediment. The volume of the sediment is reduced and water is squeezed out.
2. Cementation occurs when mineral-bearing water circulates among the grains, hardens, and cements the sediment grains together. This process is most effective when lithifying sand and gravel-sized sediments.
