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NOAA Coral Reef Conservation Program, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
An exceedingly slow rate of evolution manifested by slowly evolving lineages which survive much longer than would be expected.
Industry:Natural environment
In taxonomy, a denied name: an unavailable name which has incorrect original spellings as defined by the International Code of Zoological Nomenclature.
Industry:Natural environment
One of four branched ciliated canals in scyphozoan medusae that originates from the gastric pouches and move materials from the ring canal back toward the stomach and gastric pouches.
Industry:Natural environment
The cord of tissue In sea anemones that runs along the edge of incomplete mesenteries and which bear glandular cells and nematocysts; they are used in digestion and become acontia toward the pedal disc.
Industry:Natural environment
The number of items of a certain type divided by the number of all the numbers being considered.
Industry:Natural environment
The structure enveloping a cell, enclosing the cytoplasm and forming a selective permeability barrier which permits the passage of solvents and solutes into and out of cells. It consists of lipids, proteins and some carbohydrates.
Industry:Natural environment
A basic morphological plan of organisms that have their body parts arranged around a central axis. Such organisms tend to be circular or cylindrical in shape, e.g., a coral polyp, or have projections around a central disc, e.g., starfish .
Industry:Natural environment
