What is the common ancestor of mammals, birds and snakes

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

Based on the law of dominance, we would expect percent of the offspring from this cross to have large teeth.