When Lucy was only a fertilized egg, what did the cell have to go through to get to the trillions of cells she is made up of today?

cell division

Explanation: the body undergoes series of cell division.Who you really are now is as a result of trillions of cell division old and worn out cells of some part of our bodies dies off and new cells are formed. The cell you have now in your body is not the same with the one of many years ago. Studies has shown that new cell on some body parts e.g. skin, liver, are formed every 2 weeks, 3 months e.t.c. cell is in constantly replaced in the body and some mature ones that cannot divide, new one is them produced by division of immature stem cell

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

hope it mark me as brainlieast.