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Egg jelly can vary in composition and complexity from the relatively homogenous single layer sea urchin egg to the three layer egg jelly in starfish. [5] There is an increasing concern in how ocean acidification will affect the fertilization of eggs. In H. tuberculate, low pH can damage the eggs chemical influence on sperm mobility and velocity ...
Tripneustes gratilla, the collector urchin, is a species of sea urchin. Collector urchins are found at depths of 2 to 30 metres (7 to 100 ft) in the waters of the Indo-Pacific, Hawaii, the Red Sea, and The Bahamas. They can reach 10 to 15 centimetres (4 to 6 in) in size.
Tripneustes depressus is the largest sea urchin species in the Galápagos Islands with a mean diameter of 11.5 cm (4.5 in). The growth rate averages 0.5 mm (0.02 in) per month. [ 4 ] There is very little difference in morphology between T. depressus , Tripneustes gratilla and Tripneustes ventricosus ; they are suspected of being the same ...
Tripneustes ventricosus, commonly called the West Indian sea egg or white sea urchin, is a species of sea urchin. It is common in the Caribbean Sea , the Bahamas and Florida and may be found at depths of less than 10 metres (33 ft).
An egg drop as part of a SECME Olympiad at the University of Florida. Often schools work together to make larger competitions that pit more students against each other. One of the larger regional egg drop competitions is the Winston-Salem / Forsyth County Egg Drop Competition that takes place during Engineers Week (late February) each year. [3]
The name urchin is an old word for hedgehog, which sea urchins resemble; they have archaically been called sea hedgehogs. [6] [7] The name is derived from the Old French herichun, from Latin ericius ('hedgehog'). [8] Like other echinoderms, sea urchin early larvae have bilateral symmetry, [9] but they develop five-fold symmetry as they mature ...
Egg drop syndrome '76 (EDS '76) is a viral disease that affects birds, notably chickens, ducks, geese and swans. It is characterised by a sudden drop in production of eggs as well as its eggshell quality in apparent healthy laying birds.
Sea urchin eggs are transparent and can be manipulated easily in the research laboratory. Their eggs can be easily fertilized and then develop rapidly and synchronously. [6] [7] For decades, the sea urchin embryo has been used to establish the chromosome theory of heredity, the description of centrosomes, parthenogenesis, and fertilization.