Homologous structures (group of answer choices):

a. are also called analogous structures.
b. have identical functions.
c. are shared by organisms of the same genus.
d. have fully divergent functions.
e. are often shared by organisms in the same line of descent.

Which system revise and send electrical signals throughout the body

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.

Which of the following best describes the purpose of technology?