They didn't. Most caves are formed in limestone, by rain-water slightly acidified by abosrbing atmospheric carbon-dioxide slowly dissolving the rock.
it's a small asexual spore that is formed by some bacteria and contains a copy of chromosome.
Phagocytosis
If nutrients are not released then life processes will cease and no new organisms will be formed. Bacteria feeds on carbon compounds to break down the dead organisms and release nutrients.
Vampires don't live in caves.
It is caused by the bacteria dying, because it ran out of oxygen. The bacteria that formed a pellicle would be considered a oligate aerobe or strict aerobe, because it can only survive in the presence of oxygen.
Erosional caves are formed by the action of water or wind.
No. Most caves are formed out of limestone making that false.
The Maquoketa caves in Iowa were formed through years of natural non-glacial erosion.
Wookies live in trees, not caves.
The Maquoketa caves in Iowa were formed through years of natural non-glacial erosion.
Snottites are formed in caves by much the same process as stalactites, except that snottites are composed of living bacteria, thriving on volcanic sulphur compounds contained in water dripping down over them from above.
hhgtftfrftf
Limestone caves are formed through a process called chemical weathering. Rainwater, which is slightly acidic, dissolves the limestone rock over time, creating small cracks. These cracks then widen as more water flows through, eventually forming caves. Additionally, some limestone caves are formed through the erosion of underground rivers.
Erosional caves are formed by the action of water or wind.
They - or it? - are normal karst caves, formed in limestone by its dissolution by water. I believe they still carry a stream: if so they are still forming.
Other way round! Water and/or air are in caves.:-) Most of the world's caves have formed / are forming in limestone.
Karst caves, and it is the majority of caves; formed by acidic ground-water dissolving the limestone.