C. it cant be a since it exist
Solar system
Planets orbit around the Sun.
No they can... But if you talk to your plants it helps they stay healthy because of the oxygen you are giving them.
It totally depends upon whether modification is being done in somatic cells or germ cells. Somatic cells modification is ethically accepted because it doesn't pass from one generation to another generation but germline modification is considered as unethical because the modification will pass on to the next generation leading to the persistence of modification in future generations. The problem with genetic modifications is that the impacts of modifications are unpredictable, rather than being fruitful they may lead to lethal mutations so if it occurs in just somatic cells, then even if it is lethal/harmful, it will be confined to only that individual but if a lethal mutation occurs in germ cells then it will pass on to the subsequent generations and it will persist in all future generations.
All organisms are made of cells
all existing cells are produced by other living cells
the cell is the most basic unit of life