They didn't. Most caves are formed in limestone, by rain-water slightly acidified by abosrbing atmospheric carbon-dioxide slowly dissolving the rock.
Biospeleologists are scientists who study the life forms found in caves, such as bats, arthropods, and bacteria. They investigate the ecology and adaptations of these organisms to their underground environment.
An endospore is a dormant, highly resistant structure formed by certain bacteria as a way to survive unfavorable conditions. It consists of a thick protective coat surrounding the bacterial cell's DNA and essential structures. Endospores can germinate back into active bacteria when conditions become favorable again.
The term you are looking for is "endospore." Endospores are dormant, tough, and resistant structures formed by certain bacteria to survive harsh environmental conditions.
Two organelles that are believed to be descendants of unicellular bacteria are mitochondria and chloroplasts. The endosymbiotic theory suggests that these organelles were once free-living bacteria that were engulfed by ancestral eukaryotic cells and formed a symbiotic relationship.
A bacteriaphage (literally bacteria eater) is a virus that reproduces in a bacterium.
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.
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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.
Karst caves, and it is the majority of caves; formed by acidic ground-water dissolving the limestone.
Other way round! Water and/or air are in caves.:-) Most of the world's caves have formed / are forming in limestone.
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.
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.
Erosional caves are formed by the action of water or wind.
The two features formed by underground weathering are caves and caverns. Caves are natural underground chambers typically formed in limestone, while caverns are larger caves that often have unique formations such as stalactites and stalagmites.
Fissure, Talus, Solutional, Granite, Slate, Erosional, man-made, rare emerged Sea caves, Sea caves, and Sandstone caves.Most are created over millions of years by water dissolving minerals in the rock, leaving a void or hollow behind.