Paleontologists study the remains of organisms that lived in the past. many of these remains are preserved in rocks.

which two parts of the earth system is a paleontologist involved in?

a. lithosphere and atmosphere

b. hydrosphere and atmosphere

c. biosphere and lithosphere

d. biosphere and magnetosphere

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.

If vegetable oil is made out of veggies, then what is baby oil made out of?

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.