Why is the C-14/C-12 ratio used to date once-living organisms? O A. The amount of C-12 changes when an organism dies.
O B. An organism stops taking in carbon when it dies.
C. The half-life of C-14 changes when an organism dies.
O D. C-12 becomes radioactive when an organism dies.

Is this a scientific model? use complete sentences to explain why or why not. a graphic organizer showing the water cycle

In all living cells dna controls cellular activities by

Astudent made the lewis dot diagram of a compound shown. what is the error in the lewis dot diagram? a)an o atom should transfer all of its six electrons to mg because the formula is mgo b) both electrons of mg should be transferred to one o adam because the formula is mgo c) the electrons should be transferred from each o add him to capital mg because mg has fewer electrons d) the number of dots around mg should be four because it has to transfer two electrons to each o