What is measured in the radiocarbon dating of organic materials? a. the increase of carbon-12 in a living organism b. the ratio of carbon-14 to carbon-12 in a sample c. the ratio of carbon-12 to carbon-14 in a sample d. the decrease in carbon-12 in a decaying organism

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

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