All of the following are true statement about petrified wood except? Petrified wood is a fossil of trees.
Growth rings can be found in petrified wood.
Only trees can be petrified.
Carbon dating can be used to determine the age of the wood.

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

Predict the results of a two base insertion or deletion in a strand of dna that codes for a protien, how does this differ from a three base insertion or deletion?

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.