In sexual reproduction, genes from two different beings are mixed and create a new individual from the mix of those two polls of genes, that means that every new individual that is born by sexual reproduction, is in fact the mix of two predecessors, so we can´t have two individuals with the same genes, not even brothers, cause even brothers have different genetics cause of the way that the genes are mixed.
Cells get energy for their functioning through sunlight and other organic food molecules. ATP is a good example of energy pathways through photosynthesis.
