What three macromolecules are important energy sources for biological organisms (such as humans)? question 1 options: carbohydrates, lipids, proteins cholesterol, sodium, fiber carbohydrates, cholesterol, calcium proteins, lipids, calories

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping