Answer:
Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not.
Explanation:
Active Transport works against the concentration gradient and therefore needs energy to make it happen
Passive transport such as Diffusion and Osmosis uses the properties of natural movement of particles which moves the molecules from areas of high concentration to areas of low concentration or down the concentration gradient and happens passively without the need for energy
Answer:
speed = distance/ time= 45/3 = 15miles per hour
Explanation:
Answer:
It depletes resources until there are no longer enough to sustain the population
Explanation:
Answer:
71% of earth os covered by water
