Astructure in the leg of a human is found to carry oxygen-rich red blood cells. what else is most likely true about this structure?

a. it carries blood away from the heart.
b. it contains alveoli.
c. it also carries carbon-dioxide-rich blood.
d. it is part of the respiratory system.

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a.earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c.earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.