<span> (1) gene frequencies may be changed by migration, gene flow from another population. (2) in small populations, gene frequencies can be changed via random sampling -- this is known as genetic drift. (3) mutation pressure and (4) non-Mendelian segregation (meiotic drive) may also change gene pools. However, by far the most important agent of evolution is (5) natural selection, which operates by </span>differential reproductive success<span> of individuals.
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Vitamin B12; is a nutrient that helps keep the body's nerve, and blood cells healthy, and helps make DNA, the genetic material in all cells. It also helps to prevent a type of anemia called megaloblastic anemia that makes people tired, and weak.
Function: Sources of new cells, especially red blood cells, healthy nerves and tissues activates folate.
Sources: Animal products, including lean meats, fish, poultry, eggs, cheese, fortified foods.
Toxicity - None known
Deficiency - Pernicious anemia, macrocytic, anemia, nerve damage as indicated by tingling and numbness in the hands and feet.
Hope that helps!!!!! : )
26 in it's eggs, which is half. Eggs are haploid while somatic cells are diploid
It is any contiguous living system. There are 7
