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Natural environment
Related to any physical feature of the earth's natural environment.
17Categories 71833Terms
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Natural environment > Coral reefs 
neurotoxin
Natural environment; Coral reefs
A toxic substance which interferes with the electrical activities of nerves and inhibits, damages or destroys the tissues of the nervous system, especially neurons (nerve cells) .
sea star
Natural environment; Coral reefs
An echinoderm characterized by radial symmetry, and usually with five arms (rays) radiating from a central body. Minute pincer-like structures on the arms, called pedicellaria, ...
choanocyte chamber
Natural environment; Coral reefs
In sponges, a cavity lined with choanocytes and located between incurrent and excurrent systems.
abnormal
Natural environment; Coral reefs
Not normal; contrary to the usual structure, position, behavior or rule.
austral
Natural environment; Coral reefs
Relating to or coming from the south; of the south temperate region, between the antarctic and tropical regions.
Sub-categories
- Air (43)
- Atmosphere (59)
- Climate (1147)
- Climate change (10457)
- Coral reefs (23903)
- Deserts (738)
- Earthquake (7143)
- Flood (34)
- Forests (37)
- Grassland (35)
- Land mass (144)
- Landslide (66)
- Mountains (203)
- Plateau (39)
- Speleology (1857)
- Volcano (5852)
- Water (18527)