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01-Jan-2018 03:00

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in carbon dating which isotope of carbon is used

amino acid sequence: A series of amino acids, the building blocks of proteins, usually coded for by DNA.Exceptions are those coded for by the RNA of certain viruses, such as HIV.acquired trait: A phenotypic characteristic, acquired during growth and development, that is not genetically based and therefore cannot be passed on to the next generation (for example, the large muscles of a weightlifter).

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The eggs are soft and vulnerable to drying, therefore reproduction commonly occurs in water.antibacterial: Having the ability to kill bacteria.antibiotics: Substances that destroy or inhibit the growth of microorganisms, particularly disease-causing bacteria.Peaks on the landscape correspond to genotypic frequencies at which the average fitness is high, valleys to genotypic frequencies at which the average fitness is low. adaptive logic: A behavior has adaptive logic if it tends to increase the number of offspring that an individual contributes to the next and following generations.

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If such a behavior is even partly genetically determined, it will tend to become widespread in the population.

antibiotic resistance: A heritable trait in microorganisms that enables them to survive in the presence of an antibiotic.

Carbon-14 Dating; X-Ray Generation. the discovery of radioactive elements. it was Becquerel who discovered that certain types of atoms disintegrate by themselves.… continue reading »

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Radiometric Dating. Knowing a radioactive isotope's. uranium-238 is commonly used to establish the ages of some of the oldest objects discovered in the.… continue reading »

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Radiometric dating is a means of determining the "age" of a mineral specimen by determining the relative amounts present of certain radioactive elements. By "age" we mean the elapsed time from when the mineral specimen was formed. Radioactive elements "decay" that is, change into other elements by.… continue reading »

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Who Discovered Radioactive Dating and How are radioactive decaying elements used to calculate the age of rocks? June 15, 2014 by Karen Hill Filed Under Firsts… continue reading »

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