Answer:
C-14 from fossil had reached itshalf life
Explanation:
For radiactive isotopes (such as Carbon-14), per definition; the semi life or semi disintegration period; is defined as the time for which a certain mass isotope mass disintegrates to half of the atoms that make it up
For Carbon-14, this semi life period is 5730 years , and for the above example, as it is mentioned that we originally had 254 grams of C-14 but we currently have 127 grams (this is, exaclt half of the original mass of 254 grams), this leads us that 5730 years have passed since the original mass and the final mass (that is, one semi life period of C-14)
They involve matter and energy
Metabolism is the chemical process that occur within a living organism in order to maintain life.
Evolution first came out in 1920s because that is when the president first started it
Their poverty costs the country and the world through the loss of the island's endemic biodiversity. Madagascar's major environmental problems include: Deforestation and habitat destruction. Agricultural fires.
