the class of lampreys
203189
Here’s some Greek for you: \nCephali = head\nAspida = shield \nMorphi = shape
21668
GIANT HEART COCKLE, Dinocardium robustum.\n\nFor a photo see:\nhttp://www.gulfspecimen.org/images/M-750b-2.gif
383112
This is an excerpt from the referenced website:\n"Recovery of diagnostic ankle bones in the skeletons of primitive protocetids during our field work in Pakistan in 2000 confirmed their derivation from Artiodactyla (the mammalian order including cows, deer, hippos, etc.), and showed convincingly that whales did not originate from mesonychid condylarths as Van Valen hypothesized (and we had expected)."\n\nHope this helps.
28810
Well, first of all, at the highest taxonomic classification, fish are in Kingdom Animalia (as opposed to protista or plantae), so they are clearly animals from a scientific standpoint.  The key is that they are multicellular, capable of locomotion, and respond to their environment.  \n\nIf someone is arguing that a fish is not an animal, I am not sure where they are coming from.  Fish are fairly advanced, they have vertebrae, circulatory systems, and a brain.  They are clearly not plants or single celled organisms.
519407
Wood-boring bivalves of the family Teredinidae (commonly called shipworms) are known to harbor dense populations of gram-negative bacteria within specialized cells (bacteriocytes) in their gills. These symbionts are thought to provide enzymes, e.g., cellulase and dinitrogenase, which assist the host in utilizing wood as a primary food source. A cellulolytic, dinitrogen-fixing bacterium, Teredinibacter turnerae, has been isolated from the gill tissues of numerous teredinid bivalves and has been proposed to constitute the sole or predominant symbiont of this bivalve family. Here we demonstrate that one teredinid species, Lyrodus pedicellatus, contains at least four distinct bacterial 16S rRNA types within its gill bacteriocytes, one of which is identical to that of T. turnerae. Phylogenetic analyses indicate that the three newly detected ribotypes are derived from gamma proteobacteria that are related to but distinct (>6.5% sequence divergence) from T. turnerae. In situ hybridizations with 16S rRNA-directed probes demonstrated that the pattern of occurrence of symbiont ribotypes within bacteriocytes was predictable and specific, with some bacteriocytes containing two symbiont ribotypes. However, only two of the six possible pairwise combinations of the four ribotypes were observed to cooccur within the same host cells. The results presented here are consistent with the existence of a complex multiple symbiosis in this shipworm species.
302127
Fireflies (family Lampyridae), also known as lightning bugs, are nocturnal, luminous beetles. These names come from the fact that some species as adults emit flashes of light to attract mates, using special light-emitting organs in the abdomen. The enzyme luciferase acts on the substrate luciferin to stimulate light emission. This reaction is of scientific interest, and genes coding for these substances have been spliced into many different organisms.\n\nMany species, especially in the genus Photinus, are distinguished by the unique courtship flash patterns emitted by flying males as they search for females. Photinus females generally do not fly, but give a flash response to males of their own species. Female photuris fireflies are known for mimicking the mating flashes of other fireflies for the sole purpose of predation[1].\n\n \nScanning electron micrograph of a fireflyMany species of lampyrid beetles do not glow as adults, but they all glow as larvae. The larvae of fireflies are generally known as glowworms (but see Phengodidae). Bioluminescence serves a different function in lampyrid larvae than it does in adults. Larval bioluminescence appears to be a warning signal to predators, since many firefly larvae contain chemicals that are distasteful or toxic.\n\nThere are more than 2000 species of firefly, found in temperate and tropical environments around the world.\n\nThe ancient Chinese sometimes captured fireflies in transparent or semi-transparent containers and used them as (short-term) lanterns.\n\nTropical fireflies, particularly in Southeast Asia (Thailand and Malaysia) routinely synchronize their flashes among large groups, a startling example of spontaneous biological order which has puzzled both behavioral scientists and mathematicians. This phenomenon occurs through the night along river banks in the Malaysian jungles every day of the year. The phenomena is significantly more rare in the Western hemisphere. Current hypotheses about the causes range from diet, social interaction and altitude. In the United States, one of the most famous sightings of fireflies blinking in unison occur near Elkmont, Tennessee in the Great Smoky Mountains during the second week of June[2]. Congaree National Park in South Carolina is host to the phenomena at points at or above 2,000 feet in elevation[3][4].\n\nFireflies overwinter (sometimes for several years, depending on the species) during the larval stage by burrowing underground and emerge in the spring. After several weeks of feeding, they pupate for 2-2.5 weeks and emerge as adults.\n\nA few days after mating, a fertilized female will lay her eggs on or just below the surface of the ground. The eggs will hatch in 3-4 weeks and the larva will feed until the end of the summer when they will burrow underground to overwinter
439733
You have got to be kidding me. I have a favorite 'prehistoric water-dwelling animal'? I believe in a young earth anyway, so they're not prehistoric. I guess maybe Leviathan.
39252
Use the Linnaeus System:\n\nKingdom Phylum Class Order Family Genus Species\n\nA way to remember it: Katie Put Clams On Fred's Giant Stomach. I learned it in HS Biology 30+ years ago and never have forgotten it.
51970
most likely fish, or another animal that lives in water, perhaps an early reptile
451931
That they are in the same kingdom, phylum and class? So they share similar traits the way we share traits with other primates.
198202
These might help-\nhttp://www.itools.com/research/\nhttp://www.mun.ca/biology/scarr/2900_Species.htm\nhttp://www.biocourse.com/mhhe/bcc/domains/olc_toc.xsp
307225
PanDa before and FisHy now and i guess u must be a japanese SweetFish : )\nSorry, this answer is random~~
238889
lions and tigers are one i know of. aka ligers/tygons. i believe wolves/dogs can be too. i would assume that there could be a lot more possibilities as long as they are in the same family of animal.
993
There are more than 360 described species of sharks.\nThere are eight orders of sharks:\n\n    * Hexanchiformes\n    * Squaliformes\n    * Pristiophoriformes\n    * Squatiniformes\n    * Heterodontiformes\n    * Orectolobiformes\n    * Carcharhiniformes\n    * Lamniformes
202255
http://www.wetwebmedia.com/abalones.htm
340695
<>Actually, this is not as easy as I thought it would be.  Here're a couple sites to look at.  I'll see if I can find more.\nPS: I guess it would be easier if you were to specify a particular bivalve.  There is a variety of articles on different ones here:\nhttp://www.student.loretto.org/zoology/Bivalve.html\nhttp://cars.er.usgs.gov/Region_5_Report/html/bivalves.html\nhttp://www.esg.montana.edu/dlg/aim/mollusca/bivalve.html\nhttp://www.chesapeakebay.net/info/hard_clam.cfm\nhttp://www.aquaticinvaders.org/nan_browse.cfm?level=4&key=030201000000\nhttp://www.aquaticinvaders.org/nan_browse.cfm?level=4&key=030201000000
384476
That sounds like a Monarch Butterfly catapillar. They feed on milk weed and migrate between Canada and Mexico.