The front leg of an iguana and the wing of a bird look different, but both limbs likely originated from a similar limb in a shared ancestor. structures such as these are said to be
a)heterogeneous
b)differentiated
c)vestigial
d)homologous

one centimetre is equal to 0.01 metres

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.