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Topic: Medusa (biology)

Related Topics

Medusa

Jellyfish

Polyp

Scyphozoa

Moon Jelly

Hydrozoa

Cyanea capillata

Hydra (biology)

Sea nettle

Cnidaria

Biological life cycle

	The Huxley File §9 Medusa et al.
		Medusa continued to intrigue him for fifty years, signaled in his return to that topic in a letter of
		Most of his papers prior to 1860 were based on research into fossil marine animal such as Devonian fishes, crustacea, mollusks, cetaceans, and Cephalopodes.
		(1875) moving easily from diatoms to icebergs, is heavy with details of marine biology and with quoted passages from Wyville Thomson, Joseph Hooker, and other scientists.
	aleph0.clarku.edu /huxley/guide9.html (3246 words)

	Biology Encyclopedia (Site not responding. Last check: )
		Biology is a branch of science employing the scientific method to characterize and investigate knowledge.
		Biology has become such a vast research enterprise that it is not generally regarded as a single discipline, but a number do assist in understanding the genetic variation of a population; and physiology borrows extensively from cell biology in describing the function of organ systems.
		Evolutionary biology is mainly based on paleontology, which uses the fossil record to answer questions about the mode and tempo of evolution, as well as the developments in areas such as population genetics and evolutionary theory.
	www.hallencyclopedia.com /topic/Biology.html (3467 words)

	Medusa Biography (Mythical Monster) — Infoplease.com
		Perseus then toted Medusa's still-lethal head along on his other heroic adventures, brandishing it against foes until finally returning the prize to Athena, who affixed it to her shield.
		The blood from her head also had magical powers, and was said to be the seed from which Pegasus sprang, as well as the origin of poisonous snakes in Africa.
		Medusa, in Greek mythology - Medusa Medusa, in Greek mythology, most famous of the three monstrous Gorgon sisters.
	www.infoplease.com /biography/var/medusa.html (298 words)

	medusa - OneLook Dictionary Search
		Medusa, medusa : Encarta® World English Dictionary, North American Edition [home, info]
		Medusa, medusa : The American Heritage® Dictionary of the English Language [home, info]
		Phrases that include medusa: afro medusa, caput medusa, don medusa, eddie medusa, fall of medusa 5, more...
	www.onelook.com /?w=medusa&ls=a (316 words)

	Cnidaria
		Because polyps are typically sessile, and only some medusae possess sensory structures (the most sophisticated occur in the Cubozoa; Pearse and Pearse 1978), cnidarians are generally believed to be passive predators, feeding on prey items that blunder into their tentacles.
		The text-book depiction of the typical cnidarian life cycle is an alternation between a medusa and a polyp (termed metagenesis), the former the sexually reproductive stage and the latter the asexual stage.
		Ingestion of a medusa (Aegina citrea) by the nematocyst-containing ctenophore Haeckelia rubra (formerly Euchlora rubra): phylogenetic implications.
	tolweb.org /tree?group=Cnidaria&contgroup=Animals (2407 words)

	Reefs.org: Where Reefkeeping Begins on the Internet - Hydroids by Ronald L. Shimek October 1997 Aquarium.Net
		In the diagram of the colony, polyp and medusa, the plane of the slice is through the center of the animal.
		Medusae are primitively produced by buds off the polyp, and are pelagic, swimming with and feeding on the plankton.
		Medusa reproduce sexually by producing gametes from gonads on the undersurface of the bell.
	www.reefs.org /library/aquarium_net/1097/1097_2.html (4336 words)

	polyp and medusa - HighBeam Encyclopedia (Site not responding. Last check: )
		Some animals of this group are always polyps, some are always medusae, and some exhibit both a polyp and a medusa stage in their life cycle.
		The medusa tends to be rounded, with a thick body wall containing much mesoglea; it swims or is carried in the current with the mouth side down and the tentacles dangling.
		A medusa produces eggs or sperm, which are usually shed into the water; when an egg is fertilized, it develops into a swimming larva, which eventually settles and grows into a polyp.
	www.encyclopedia.com /doc/1E1-polypNme.html (902 words)

	TechBriefs.com - News Center - Who's Who at NASA
		Called Medusa, the instrument package is about the size of a big footlocker and will “sense” life by analyzing samples from severe environments on Earth similar to conditions on Europa, Mars, and other planets in the solar system.
		Michael Flynn: The Medusa project is focused on understanding the potential for abiotic life forms – life forms that exist devoid of the input of photosynthesis or the decomposition of organic materials.
		We’ve used the Medusa instrument both in hydrothermal vents and also at water called boreholes, which are wells that have been drilled into the deep ocean to understand the flow circulation associated with those structures.
	www.nasatech.com /NEWS/Oct04/who_1004.html (1765 words)

	Aquarium Invertebrates
		Despite the fact that the medusa worms lack these structures and are considered ‘relatively non-toxic’ by comparison to many of these species, this does not mean that they are by any means non-toxic.
		Even without the Cuvierian tubules and their potent toxins, medusa worms have a variety of distasteful chemicals associated with the skin and body wall to protect them from being eaten by fishes, crabs and lobsters on the coral reef.
		Medusa worms get their common name because they resemble a giant worm from which a "mop" of feeding tentacles is constantly being slapped across the substrate before being drawn into the mouth.
	www.advancedaquarist.com /issues/nov2002/invert.htm (4376 words)

	* Medusa - (Biology): Definition
		Source: Noland, George B. General Biology, 11th Edition.
		medusa A jellyfish, or the free-swimming stage in the life cycle of cnidarians.
		The jelly of the medusa is a much-enlarged mesoglea.
	en.mimi.hu /biology/medusa.html (81 words)

	Seeing Is Believing
		Each strand of Medusa's hair is actually a protein chain, called a "microtubule," that is growing and shrinking.
		He is a member of the Department of Biology in the College of Arts and Sciences.
		Down syndrome is one of the most common diseases caused by errors in mitosis or in meiosis, the closely related process of cell division in sperm and egg cells.
	research.unc.edu /endeavors/spr97/cell.html (1150 words)

	RADIATES (Site not responding. Last check: )
		Medusa as adult can have a polyp as a larval stage.
		Eventually, reproductive polyps: gonangia: budding produces medusae (2mm to several cm)) which are free-swimming.
		The medusae has sensory cells, the statocysts (for equilibrium) and ocelli (light sensitive).
	faculty.weber.edu /nokazaki/animal_Biology/CNIDARIAN-student.htm (851 words)

	Metamorphosis \| Macmillan Animal Sciences
		Metamorphosis, or a change in form, in biology means the transition from a larval stage to an adult stage.
		The medusa stage involves a single individual or a colony of individuals that act as a single free-swimming organism (examples include jellyfish and man-o-war).
		In others, the medusa is the dominant life history stage and the polyp stage is lacking completely.
	www.bookrags.com /research/metamorphosis-ansc-03 (832 words)

	Medusa Biography (Mythical Monster) — FactMonster.com
		Perseus then toted Medusa's still-lethal head along on his other heroic adventures, brandishing it against foes until finally returning the prize to Athena, who affixed it to her shield.
		The blood from her head also had magical powers, and was said to be the seed from which Pegasus sprang, as well as the origin of poisonous snakes in Africa.
		Medusa, in Greek mythology - Medusa Medusa, in Greek mythology, most famous of the three monstrous Gorgon sisters.
	www.factmonster.com /biography/var/medusa.html (318 words)

	NASA - NASA Developing Detector to Discover Life on Other Planets
		Medusa carries its own on-board power, data storage and processing and communications, as well as sensors to measure temperature and flow.
		In addition, Medusa includes an instrument that measures how much carbon 12 and carbon 13 are in gases coming from undersea vents to find out if living things have used these gases.
		In the near future, NASA is planning to use fully equipped Medusa systems to explore extreme undersea and other environments on Earth, seeking unknown life forms, according to Flynn.
	www.nasa.gov /vision/earth/technologies/Life_Detector.html (669 words)

	Laboratory 11 Review
		In many cases the polyp form alternates with the medusa form in the course of the animal's life cycle.
		Prime examples of this variation are the colonial polyps of both Plumularia and Obelia, as well as the free-swimming Portuguese man-of-war (medusa).
		The class scyphozoa illustrates a group of cnidarians in which the medusa is the conspicious stage in the life cycle.
	www.umanitoba.ca /Biology/lab11/biolab11_3.html (508 words)

	David Isaacson's Book Reviews - WMU Libraries (Site not responding. Last check: )
		In his essay collection, The Medusa and the Snail: More Notes of a Biology Watcher, published in 1979 by Viking, the physician Lewis Thomas adds to a previous collection, The Lives of a Cell, which won the National Book Award in 1974.
		Besides biology and other scientific subjects, Thomas writes well about many non-scientific subjects, including the vagaries of punctuation marks, the Tuscon Zoo, Montaigne, thinking about thinking, and the roots of words.
		Biology needs a better word than "error" of the driving force in evolution.
	www.wmich.edu /library/bookreviews/1999/thomas-medusa.php (805 words)

	tecolahagos.com - ethiopian related issues and commentary
		In fact, since the publication of the tale of “the medusa and the snail” by Lewis Thomas, a number of religious leaders have used the life-cycles of the “the medusa and the snail” as a lesson and admonishment of the members of their congregations about ingesting out of greed something that will destroy the individual.
		The reason I find the relationship between the Medusa and the Nudibranch appropriate metaphor for our current political situation is due to its uncanny historicity in the illustration of the type of relationships that Ethiopian politicians and the Ethiopian society itself have had over the centuries.
		And the new Medusa emerged as the EPRDF in 1991 and has been ingesting in its turn the spawns of Mengstu and collaborators, a number of liberation fronts, Meison, EPRP, the OLF, et cetera.
	www.tecolahagos.com /medusa.htm (9009 words)

	Amazon.com: The Medusa and the Snail: More Notes of a Biology Watcher: Books: Lewis Thomas (Site not responding. Last check: )
		If you are in the camp which believes that scientists use one side of their brain, and that writers use the other, be prepared for a big surprise.
		Then, as if to prove the general rule with a startling exception, Dr. Thomas shows how a particular medusa and snail in the Sea of Naples appear to be confused about their molecular configuration and fuse into a single organism.
		The jellyfish (medusa) is affixed to the mouth of the slug (snail), and when the slug produces larvae, one becomes entrapped in the tentacles of the tiny jellyfish.
	www.amazon.com /Medusa-Snail-Notes-Biology-Watcher/dp/0140243194 (1678 words)

	Pharyngula::Diploblasts and triploblasts (Site not responding. Last check: )
		That all sounds neat and tidy, but this is biology, so of course it also gets fuzzy around the edges, and nothing is quite as discrete as three, simple, sharp germ layers.
		The medusa has greater complexity, new cell types, and also seems to have a distinct third germ layer—calling it a diploblast seems to be a misnomer.
		In the medusa, the ectocodon also cavitates, and the part near the feeding organ (manubrium, ma in the stage 5-6 diagram) will form a layer of smooth muscle (green), while the part towards the outside will form the smooth and striated muscle lining the umbrella-shaped bell of the jellyfish.
	pharyngula.org /index/weblog/comments/diploblasts_and_triploblasts (2231 words)

	INTERNATIONAL UNIVERSITY FOR THE BIO
		Not a single form of life was found in a radius of some kilometers and only a medusa had survived at a distance.
		In terms of biology, a medusa represents the early stage of evolution of life and this destruction indicates how far into the past technology can swing the pendulum of evolution.
		Biology has served as a model for computer memory storage and the processing of information.
	www.biopolitics.gr /HTML/PUBS/VOL3/ba-ava.htm (6477 words)

	BioG 105/106 \| Autotutorial Introductory Biology
		Cnidarians are diploblastic eumetazoans (multi-cellular animals with two true tissue layers, they lack mesoderm, instead having a gel-like acellular mesoglea) and are distinct from the other groups studied in lab in displaying radial symmetry, placing them on an evolutionary lineage (the Radiata) separate from the other groups we will focus on (Bilateria).
		Cnidarians are often colonial (the corals are the best examples here) and many species have a dimorphic life cycle with one stage a sessile polyp form and the other a motile medusa form.
		Note that medusae and polyps are essentially the same body plan, simply inverted in orientation.
	instruct1.cit.cornell.edu /Courses/biog105/labs/inverts/cnidaria.html (444 words)

	Medusa and the Snail Reading Response (schoolyard subversion) (Site not responding. Last check: )
		It is not explicitly stated, but the message is clear: humans are social creatures and we need each other.
		Despite the fact that they are labeled "more notes of a biology watcher", these essays have more universal meaning.
		In "On Disease", he seems to degrade into a jumble of jargon, so complex that it is hard for one not well acquainted with the field of biology to understand.
	www.aaronsw.com /school/medusaAndTheSnail (1089 words)

	New Jersey Scuba Diver - Marine Biology - Plant-like Animals
		All these are animals that, in a sense, occupy the physical niche of the plants which are missing from the deeper parts of the marine environment.
		Thus many medusas and polyps are actually the same species, merely in different generations.
		In Jellyfishes, the egg-laying mobile medusa stage is dominant, and the polyp stage is greatly reduced in importance and often difficult to identify.
	www.njscuba.net /biology/sw_plant-like.html (1906 words)

	Jellyfish - Podocoryne carnea - Cnidaria - Zoology - Basel
		A single gonozoid can have medusa buds from the very early stages to the mature medusa, which are released daily.
		In the Atlantic strains the medusae are sexually mature when they are released and with males and females larvae can be produced.
		The medusa budding process could be seen as a delayed completion of gastrulation with polyps as a second, asexually reproducing larval stage.
	pages.unibas.ch /dib/zoologie/research/schmid/jellyfish.html (416 words)

	Nikon MicroscopyU: Small World Competition Gallery
		Winners came from such fields as chemistry, biology, materials research, botany, and biotechnology.
		Winners came from such fields as chemistry, electronics, biology, genetics, pathology, materials research, botany, and biotechnology.
		Winners came from such fields as chemistry, electronics, biology, veterinary medicine, pathology, materials research, ecology, and biotechnology.
	www.microscopyu.com /smallworld/gallery (2397 words)

	Medusa - Medusa snake, Medusa movie
		Versace medusa Medusa image Medusa stone Medusa tattoo Medusa headset Medusa costume Bagni medusa Medusa art Medusa.
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		Medusa record The wake of the medusa Perseus and medusa Medusa wrestler Medusa image
	digilander.libero.it /bicikl12/medusa.html (133 words)

	Buy.com - Medusa and the Snail; More Notes of a Biology Watcher : Lewis Thomas : ISBN 9780140243192 (Site not responding. Last check: )
		Buy.com - Medusa and the Snail; More Notes of a Biology Watcher : Lewis Thomas : ISBN 9780140243192
		Medusa and the Snail; More Notes of a Biology Watcher (Paperback)
		An academic and physician, Lewis Thomas is best known as a writer of essays on science, especially medicine and biology.
	www.buy.com /prod/medusa-and-the-snail-more-notes-of-a-biology-watcher/q/loc/106/30016032.html (368 words)

	Algol: The Eye of Medusa
		I suppose we modern folk have lost some of that sense of whimsy and imagination that the ancients had so that all we see are geometric shapes.
		But if we can't envision the head of Medusa with Algol as her eye, we can at least discern much of Algol's nature through science.
		Algol is the second brightest star in the constellation, located almost exactly midway between the "w" of Cassiopeia and the Pleiades.
	www.suite101.com /article.cfm/amateur_astronomy/84937 (483 words)

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