Which of the following requires the use of energy to move a molecule across a cell membrane?

a. active transport
b. simple diffusion
c. osmotic pressure
d. facilitated diffusion

A. Active transport is the correct answer.

Explanation:

Active transport requires the use of energy to move a molecule across a cell membrane.

Active transport is a process in which molecules move against the concentration gradient.

To move the molecules from the lower concentration region to the higher concentration region active transport use energy in the form of Adenosine Triphosphate(ATP).

ATP gives the needed energy for the active transport process to move the molecules across the cell membmbrane or concentration gradient.

Sodium potassium pump is a type of active transport it uses energy to transport the sodium ions and potassium ions inside and outside of the cells.

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.

earthquakes in florida are rare because the state is not located near any tectonic plates. in fact, florida is tied for first place as having the fewest earthquakes of any state. much of florida is limestone and seafloor materials that is not conducive to earthquakes.

explanation: