One similarity between magnetism and gravity is
Group of answer choices

a. magnetism and gravity only work at close distances

b. magnetism and gravity both exhibit a push and pull force

c. Magnetism and gravity are both non-contact forces

d. magnetism and gravity are both contact forces

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 the coding part of an mrna molecule is 1800 nucleotides (bases) in length, this molecule will contain codons and code for a polypeptide that is amino acids long.

Apart of an ecosystem that can restrict the growth of a population is referred to as