Which of the following statements accurately describes how blood flows through the heart?
a. oxygen- poor blood is carried through the inferior vena cava to the left atrium.
b. oxygen- poor blood is carried through the left pulmonary veins to the left atrium.
c. oxygen- rich blood is carried in the right pulmonary veins from the left lung to the right atrium.
d. oxygen- rich blood is carried in the aorta from the left ventricle to the body

Describe five factors that influence the value of fuel

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

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?