Part 1: describe the mass and the surface temperature of dwarf stars. part 2: explain using complete sentences where on the hr diagram you would expect to find a dwarf star based on its physical properties.

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.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

In which way are mercury and venus similar? they both rotate from east to west. they are both small and rocky. they both have thick atmospheres. they both are similar to earth in structure.