What are some natural phenomenon's caused by archaebacteria?

They caused some certain diseases in humans.

Methanogens a type of archaebacteria are source of natural gas.

They are found in sewage for sewage treatment.

Explanation:

Archaebacteria are microscopic and single celled organisms that lack nuclei. They don't have peptidoglylcan in their cell walls. They have tRNA and ribosomal RNA. They were formerly classified as bacteria.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.