Which describes an altocumulus cloud? a.
high, feathery cloud
c.
low storm cloud
b.
puffy mid-level cloud
d.
high cloud made of ice crystals

Please select the best answer from the choices provided

A
B
C
D

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.

Here's one way to follow the scientific method. place the missing steps in the correct position in the process.

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun