Which descriptions refer to fog? Select two options.

burns off when it gets dark
forms at or near the ground
extends up to 10 miles into the sky
found in areas near bodies of water
forms when the ground warms at night after a cool, dry day

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.

Indica el nombre y la fucion de los vasos sanguineos que entran y salen de los riñones

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal