When all particles are removed and can not erode the surface any more, O a sand dune
O desert pavement
O deflation
O desert varnish

What’s the right answer ?

Earth and space science

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?

What goes in and out of a cell respiration?