Active transport is the movement of molecules against the concentration gradient from an area of high concentration to an area of low concentration, which requires energy in the form of ATP. Hope this helps! ^.^
Answer:
Centripetal force is perpendicular to the velocity of the satellite.
Explanation:
because there is no friction or wind resistance, the speed of the satellite remains the same
A population decrease in primary producers would affect the ecosystem negatively because everyone who ate the primary consumers would have a lack of food.
