Select all correct statements about telomerase or about the relationship between telomeres, telomerase, and cancer. a) Telomere shortening usually leads to somatic cell death, but cancer cells are often immortal.
b) Telomeres in cancer cells are typically shorter than telomeres in the somatic cells of the same individual.
c) Unlike most somatic cells, cancer cells express telomerase, which prevents shortening of chromosome ends.
d) Cells with a deletion of the gene that encodes a telomerase protein are more likely to become cancerous.
e) Telomerase is a complex of RNA and protein.
f) Telomerase is a complex of DNA and protein.

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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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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