Answer:
Because there is already a presence of soil rather than primary succession which doesn't have a presence of soil
Explanation:
The organ that has all of those parts is the human eye.
The sperm start travels in the seminiferous tubules of the testes where spermatozoa are born, and then transport to the epididymis which sperm passes to the vas deferens and it ended at the utero-tubal junction where egg fertilizes in the fallopian tubes.
I think the cell’s can become cancer cells but I’m sorry if it isn’t correct...