Which statement is true?
sediment can be any size.
sediment is only small particles of sand that settle out of the water.
sediment doesn't move from the place where it was formed.
sediment in the wind is too small to cause damage.

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.

Which image shows labeled organelles that are present only in plant cells?

Were does condensation occur? a) hydroshereb) lithosherec) boishered) atmosphere