Which of the following choices represent mrna molecules that could be produced from the primary rna transcript by alternative rna splicing? (in each choice, the yellow part on the left represents the 5' cap, and the yellow part on the right represents the poly-a tail.)
a) acegi
b) acgi
c) acei

answer; ///i do believe that the correct answer is (c) hold atoms together to form compound;

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

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explanation: