The atmosphere is considered because of its ability to transport and distribute materials throughout the globe quickly.
a)a superhighway
b)a blanket
c)stagnant
d)a shield

As scientists have investigated evolution from a variety of fields, they have found that some of darwin's orginal ideas were inaccurate or incomplete. t explanation provided by evolution was updated each time to reflect the new information they found. what does this suggest about the theory of evolution? it has become a stronger and clearer theory as new information is collected.

How does the closing of the ductus arteriosus and ductus venosus alter circulation in an infant? a. increases blood flow to the pulmonary artery and increases blood flow to the umbilical vein b. increases blood flow to the pulmonary artery and reduces blood flow to the umbilical vein c. reduces blood flow to the pulmonary vein and increases blood flow to the umbilical artery d. reduces blood flow to the pulmonary vein and reduces blood flow to the umbilical artery

Scientific research about the nitrogen cycle and water quality is mostvaluable to human populations with: afew sources of electricity.b. few sources of fresh water.c. large coastal populations.d. large amounts of farmland.