Answer:
Plants and animals assimilate carbon-14 from carbon dioxide throughout their life. When they die, they stop exchanging carbon with the biosphere and their carbon-14 content begins to decrease at a rate determined by the law of radioactive decay.
Radiocarbon dating is basically a method designed to measure residual radioactivity.
Explanation:
Carbon-14 is a weakly radioactive carbon isotope; It is also known as radiocarbon, and is an isotopic stopwatch.
Radiocarbon dating is only applicable to organic materials and some inorganic materials (not applicable to metals).
Proportional gas counting, liquid scintillation counting, and accelerator mass spectrometry are the three main methods of radiocarbon dating.
The radiocarbon, or carbon-14, is an isotope of the carbon element that is unstable and weakly radioactive. The stable isotopes are carbon-12 and carbon-13.
Carbon 14 is continuously formed in the upper atmosphere by the effect of cosmic ray neutrons on nitrogen-14 atoms, rapidly oxidizing in the air to form carbon dioxide and entering the global carbon cycle.
Accelerator mass spectrometry (AMS) is a modern method of radiocarbon dating that is considered the most efficient way to measure the radiocarbon content of a sample. In this method, the content of carbon-14 is measured directly in relation to carbon-12 and carbon-13 present. The method does not take into account beta particles, but the number of carbon atoms present in the sample and the proportion of the isotopes.
The cell first needs to replicate DNA by using the previous DNA as template. Then the cell can get two sets of same DNA. When division, each set DNA will go to each cell so that a full set of DNA gets passed on to each daughter cell.
Answer: c.Natural selection is the process by which organisms with more beneficial traits are more likely to survive and reproduce.
Natural selection is the differential survival and reproduction of individuals because of differences in the phenotype. Phenotypic characteristics favors the survival of some organisms in the population better than others. Example given by Darwin population of colored beetles green and red belonging to same species. Green ones mimic the color of grass not noticed by birds but red ones were noticed and eaten by birds. This is the selection by nature for better suited individuals. Green color gave the survival advantage to these beetles which is a phenotypic characteristic therefore, they will produce more offsprings than the red ones and also pass on the phenotypic trait to their offsprings.
Answer:
Fetishistic
Explanation:
Paraphilia is a disorder where a person has recurrent, intense sexually arousing fantasies, sexual urges, or behaviors involving nonhuman objects, children or other non-consenting persons or the suffering or humiliations of self or partner.
Fetishistic disorder is then a type of paraphylic disorder involving sexual gratification from objects
Answer:
La sociedad civil también se llama tercer sector de la sociedad.
Explicación:
La sociedad civil es un tipo de sociedad que se compone de personas que exigen los derechos y deseos del público. También se le llama tercer sector de la sociedad porque es diferente del sector gubernamental y empresarial. Las personas del sector familiar y privado conforman la sociedad civil. Es importante para la democracia porque proporciona control y equilibrio sobre la democracia y evita que el gobierno tome malas decisiones.
