Biology, 27.08.2019 09:30, enchantednights
Stalactites and stalagmites are two coneshaped mineral formations that form in caves. stalactites hang down from the ceiling and stalagmites rise up from the cave floor. what causes cave minerals to form in this way?
existing minerals change into new minerals when nearby molten rock causes an increase in temperature.
molten rock cools and hardens as it reaches earth's surface.
groundwater carrying dissolved materials combines with surface water and causes minerals to precipitate out of solution.
groundwater heated by molten rock reacts with minerals in the rock to form new minerals.
Answers: 1
Biology, 21.06.2019 18:30, smelcher3900
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.
Answers: 3
Biology, 22.06.2019 02:30, sabrinarasull1pe6s61
Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c. ozone layer hole d. increase in sea levels
Answers: 1
Biology, 22.06.2019 13:50, arrichardson787
The fluid mosaic model of the membrane proposed that membranes
Answers: 1
Stalactites and stalagmites are two coneshaped mineral formations that form in caves. stalactites ha...
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