Red blood cells (erythrocytes) are biconcave disks and this shape increases the of the cell and maximizes diffusion of gases

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

Each hereditary trait corresponds to

Why does bubbling occur when vinegar mixed with baking soda