Why would it be a mistake to locate a wood burning stove on the 2nd floor of a two story house?

Which of the following is not a way in which a vascular plant's xylem and phloem are similar?

How was the climate when the ambulocetus was alive

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.