Answer:
active transport
Explanation:
they are using energy to move across the membrane, using energy means its active Hope this helps
C) the lungs.
The air moves down the trachea and into the lungs where it is picked up by the blood
Answer: False
Explanation: This is FALSE because the bats make a high frequency sound and we can't hear that type of sound.
Velocity can vary as long there is specific direction (displacement)
Speed has no direction therefore change in speed is not necessary the velocity...
Velocity is also in a specified direction
