How similar are daughter cells to each other and to the orginal parent cell?

Daughter cells are copies of the original parent cell and identical to each other, assuming no mutations occurred. As a result of the parent cell dividing, 2 daughter cells are created.

the way that the mass of carbon can be conserved through cellular respiration is through a process/law called the law of conservation of mass which even tho it undergoes a process, mass is not be destroyed or changed

the answer to your question is sperm