Some bakers of sourdough and a few other types of bread have what they call “starter dough.” This dough contains yeast from which they make all their bread. Some starter dough is more than 100 years old. The dough has to be “fed” more flour and water on a regular basis for it to remain usable. Why must the starter dough be “fed”?

Which of the following occurs after a natural or unnatural disturbance in an ecosystem

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

Which are reasons cells undergo cell division?