<span>Mitosis is a cell division in which one diploid cell divides into two identical diploid cells. On the other hand, a</span> cell division which results in the reduction of chromosome number by half in daughter cells is called meiosis. Meiosis consists of meiosis I and meiosis II. After meiosis I, the number of chromosomes is reduced by half and the result is two haploid cells. Meiosis II is actually analogous to mitosis. So, in meiosis II, haploid cell divides into two identical haploid cells. In total, meiosis results in four haploid cells while mitosis results in two diploid cells.
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.
Anatomical terminology. Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma. In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream.
Answer:
Stem cells has a great contribution in order to maintaining homeostasis in the body because stem cells are produced rapidly and sent to the sites of the body where cells are old or get damaged maintain stability in the body.
Explanation:
Stem cells are specially type of cells which has the ability to change their structure according to the cell needed by the body. If brain cells are damaged, stem cells change their shape according to the brain cells and perform their functions by replacing the damage cells.
Answer:
smog
Explanation:
Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities.
