What did abraham lincoln do for a living

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

The production of cells during mitosis into specialized function is recombination or differentiation

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