Which statement describes an example of gene therapy?

a. a virus is used to transfer human dna into a bacterial cell.

b. a defective gene is replaced with a normal gene.

c. dna banding patterns are used to identify an individual.

d. the genes for a certain desirable trait are identified.

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

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000

What would most likely happen to a unicellular organism if it was exposed to a hypotonic solution for an extended period of time?