Alteration of histones by addition of methyl and acetyl groups to particular amino acids Alteration of histones by addition of methyl and acetyl groups to particular amino acids results in the remodeling of chromatin that can activate or inhibit gene expression. changes B-DNA to Z-DNA. helps preserve telomeres during DNA replication. alters the denaturation and renaturation of DNA. creates G bands seen after Giemsa staining of chromosomes.

This map shows how climate change might affect precipitation patterns in the great plains of the united states by the end of this century. brown shoes a decrease in percipitation, and blue shows an increase. the maps differ based on the predictive levels of green house emissions. the maps shows that northern area should get a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels. southern areas show a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels. to use these maps to prepare for natural disasters in the great plains, scientist need to ask? a. how many tons of emissions were used at the basis of the map. b. which types of fossil fuels are used in the great plains c. if you think the above is wrong it's probly c the question is cut off

What is any method of measuring the age of an object or event in years, such as using atomic half-life?

Which describes a grizzly bear’s habitat?