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Ecology

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Ecology

rhizome
Biology; Ecology

A horizontal underground stem from which spring shoots, buds, and roots. A potato is a thickened rhizome. Found in ferns, horsetails, and asparagus.

regolith
Biology; Ecology

A layer of loose, weathered or eroded material covering rock. An important habitat for both plants and animals who cannot make a home in solid rock.

catchment
Biology; Ecology

A natural or artificial basement for trapping water. One natural version catches rainfall and feeds it into a stream that drains the catchment area.

age of earth
Biology; Ecology

4. 55 billion years. Formed by particles of gas and denser materials once ejected from exploding supernovae and gradually pulled together by gravity.

fen
Biology; Ecology

Partially flooded low-lying peatland fed water from upslope. (Fen peat usually comes from decomposing sedges, rushes, and other such plant matter. )

marsupial
Biology; Ecology

A mammal whose offspring develop after birth in the mother’s pouch (the marsupium) outside her body. 75% of living marsupials come from Australia.

hyperparasite
Biology; Ecology

A parasite to another parasite. In crabs, pepper spot disease occurs when the flatworms that infect the crab are infected by a parasitic protozoan.

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