In photosynthetic cells as green algae and plant cells, , synthesis of ATP by the chemiosmotic mechanism occurs during . a. photosynthesis and respiration b. respiration only c. photosynthesis only d. neither photosynthesis nor respiration

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point