Which of these BEST describes the formation of earth a. earth was formed when Jupiter, the largest planet split into smaller pieces during its formation
b. earth was formed from a cloud of gas and dust spinning and moving some distance from the sun.
c. earth was formed from the collision of multiple asteroids. the asteroids merged into a planet.
d. earth was formed when a piece of the sun broke off the star as it was forming

b. earth was formed from a cloud of gas and dust spinning and moving some distance from the sun.

the form of energy changes and the total energy increases0l

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.