The incident would be a volcanic eruption
Answer:
In stage 1., the enzyme RuBisCO incorporates carbon dioxide into an organic molecule, 3-PGA.
It is algae because it is bacteria and bacteria live and breathe.
During sex, sperm cells travel through the vagina to the uterus and fallopian tubes. In the fallopian tube, the sperm meets the egg that was released from the ovary during ovulation.
What system are we talking about? Context is needed... water cycle, cells, etc?