Slash-and-burn agriculture affects global warming by a. adding more methane gas to the environment, thereby increasing greenhouse gases b. removing methane producers from the environment, thereby decreasing greenhouse gases c. removing photosynthetic organisms from the environment, thereby increasing co2 in the environment d. removing photosynthetic organisms from the environment, thereby decreasing co2 in the environment e. no effect will be seen in global warming or greenhouse gases from this type of agriculture.

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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this protocol provides a detailed procedure for total protein extraction for western blot analysis from achieved samples following trizol isolation of rna.