Why do we need the electron transport chain to complete cellular respiration? be brief

Aperson travels 35 km in 0.4hrs, followed by 53 km in 0.6 hr. what is the average speed

Cells destroy body cells infected by a virus or bacteria.

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. chinchilla x albino a) all chinchilla b) 1/2 chinchilla, 1/2 albino c) 3/4 chinchilla, 1/4 albino