Suppose that Caron found that mRNA levels increased in response to laminin, but protein levels did not. Which statement could have been a possible explanation for this result? a)Laminin increases mRNA levels, but another matrix protein increases translation of the albumin mRNA.
b)Type IV collagen might be responsible for increasing albumin protein levels.
c)HSPG might be responsible for increasing albumin protein levels.
d)Laminin may form a complex with another extracellular matrix protein to change albumin protein levels.
e)All of the answer options are correct.

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.

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when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

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