Durning gradual metamorphosis, and egg hatches into a stage called a _______.?
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In insects that exhibit paurometabolous or hemimetabolous metamorphsosis (an 'incomplete' metamorhphosis in which there is no pupal stage), the juvenile stage (between egg and adult) is known as a nymph.  In aquatic forms, like dragonflies or mayflies, it is also sometimes referred to as a naeid.\n\nBTW:  Why is this in Earth Science?
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Evolution of reproduction. Nature finds its way.
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It varies depending on the organism, tissue and stage of development.
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basically what you do is you take an unfertilized egg and the nucleus of a pre-existing animal, and you put the nucleus into the egg and let it grow.
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In evolutionary terms, a chicken was first hatched from an egg of a slightly different animal.  Therefore, the egg came first.
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The eggs were already in the product. The eggs lie dormant until the environment is right, and then they hatch.
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Stage 1, stage 2, stage 3
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In a mind boggling maneuver, the caterpillar attaches itself to a support of some kind by its hind foot hooks, suspending head downward. The caterpillar latches hooking claws onto this 'button' it has made, and lowers its body to hang in a "J" shape, head downward. The metamorphosis occurring within catches up with the creature while suspended in this position. In a short while, it gets the message "It's time to change your clothes." With these changes complete, peristaltic waves pass from the head toward the attached end . The skin parts at a designed suture line and peels upward. The little creature unzips its caterpillar skin, splitting the striped outfit, and undresses itself! There, underneath it all, is a pale green pupa. The new pupa is exposed to the air and its new jade green skin can dry and harden.
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Soon after mating, impregnated females deposit fertilized eggs by dipping their abdomens into shallow water alongside vegetation, or into soft muck. The eggs undergo a maturation over winter and hatch into larvae the next spring. The ugly larvae have been called little "dirt balls" since dirt clings to the hairs that cover their bodies. They are voracious aquatic predators feeding night and day (the larva at the left was cleaned up for the photograph by Lauren Pintor). They capture their food by means of a hinged lower lip that can be flipped forward to trap prey on stiff bristles. The lip can be extended about a third of the length of the larva's body, giving them enough reach to even capture small fish. Larvae breathe by means of gills inside the anal chamber, into which water is pumped, then forcibly expelled. \n\nOver a 3-4 year period, larvae molt many times as they grow their way toward adulthood and an aerial existence. When they reach a pre-adult stage, they stop feeding and crawl out of the water onto vegetation, where they gulp air to inflate and expand their bodies. They break out of their larval skin and next inflate their wings, which become outstretched. Thereafter they wait as their body parts dry. Then they take flight to feed on other flying insects some distance from their watery birthplace. \n\nThe adults live for only 4-7 weeks. After vigorous daylight feeding on mosquitoes, deerflies, flying ants, and whatever they can capture in flight, females return to water after copulating to lay their eggs. Males join them and patrol the swale or pond where eggs are being deposited. It is a short, but intense, adulthood of feeding, sexual interaction, and egg deposition.
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I don't think you mean development of the zygote....that is a fertilized egg.  Do you mean all the embryological stages after fertilization? There are similarities and differences in all three of these organisms' embryology.\n\nThe starfish zygote and amphibian zygote are both slimy-jelly coated and are vulnerable to fungus-bacterial infections in the water they are laid in, and vulnerable to being eaten by misc hungry aquatic organisms. These eggs are laid and fertilized as a result of external fertilization in the water.  Starfish just release the gametes in the water at a specific time in breeding season without a mating act per se.  If you are standing on a hill above a tidepool while groups of male and female starfish shed their gametes you can see the cloudiness in the water from the huge quantities of sperm and egg they release quasi-synchronistically. \n\nFrogs and other amphibians actually have a mating act called amplexus. The male does all the ribbiting to audition for the job of dna donor.  If she is ok with it, he jumps on the back of the female and he squeezes her eggs out while he releases his sperm on them. Starfish zygotes go thru many many larval stages-metamorphoses (they are part of zooplankton) and eventually mature to the adult on the tidepool rocks.  The bipinnaria larva of echinoderms are famous for their DEUTEROSTOMATE development like other vertebrates-chordates (see below)!\n\nAmphibian zygotes eventually turn into ONE aquatic tadpole larval stage which uses gills and then grow appendages-lungs to be eventually become more terrestrial.  \n\nAmphibians do not have an amnion in their eggs and are therefore anamniotes. Birds and reptiles produce "land eggs" that can resist dessication pretty well and are therefore called AMNIOTES, those who have the amniotic sac to help protect the developing embryo from the drying air on land. The amniotic fluid is in the amniotic sac. Mammals can lay eggs (monotremes) but most are placental mammals who have the amniotic sac in the uterus, but amnion and amniotic fluid with the fetus is not inside a shelled egg like the birds and reptiles.So placental mammals are the most advanced amniotes\n\nOne way these three embryo types do NOT differ: starfish and amphibian and bird are all "deuterostomate" animals.  . All animals you listed on your question are deuterostomate. Most invertebrates are "protostomes. So it is said to be an evolutionary LINK, that the echinoderm-starfish bipinnaria larva shows deuterostomate embryology! "Proto means "first," deutero means "last" and stom means "mouth." Again, both echinoderm bipinnaria larva and chordates-vertebrates (amphibians and birds) are deuterostomate. \n\nWhen embryos change from blastulas to gastrulas, there is an early indentation-invagination process of the tissue to begin the formation of endoderm and the future GI tract from MOUTH to ANUS.  In protostomates, most invertebrates except the echinoderm-starfish group, the mouth is formed first at the first indentation or invagination of blastula to become gastrula, and the anus is formed last.  \n\nIn the deuterostomates, the mouth is formed last and the anus is formed first.  The Echinoderms which includes the starfish, are deuterosomates like the chordates (bird and amphibian), including us humans. Aren't you glad you now know that your anus formed before your mouth?
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Limestone becomes marble in metamorphosis.\nShale becomes schist.\nSandstone becomes granite.
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You could have found good answers to this either in your textbook or by a little web searching. \nOh, well...\nThe eggs of frogs have little vitellum, i.e, they're oligolecithal. This means that the entire first cell (zygote) will cleave to originate the individual. It undergoes the usual phases: blastula, gastrula and neurula. \nSee more at the links:\nhttp://users.rcn.com/jkimball.ma.ultranet/BiologyPages/F/FrogEmbryology.html\nhttp://www.uoguelph.ca/zoology/devobio/dbindex.htm\nhttp://embryology.med.unsw.edu.au/OtherEmb/frog1.htm#Frog%20Life%20Cycle
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It doesn't matter that they are fish cells.\nThey will look the same as these stages in any other cell except there will be a different number of chromosomes
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No.  Changes in form within one individual's lifetime are called metamorphosis.
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The egg came first.  At some time in the evolutionary development of the chicken as we know it, there was some previous creature that was not quite a chicken.  Let's call this a "proto-chicken".  In the ovary of the proto-chicken, which is always subject to some small amount of mutation, it carries all the genes that would make a proto-chicken, but it gets mutated to form what we think of as a chicken.  The egg is laid, and when it hatches, it will become a chicken.  Thus, the proto-chicken which laid the egg is not a chicken, but the egg will produce a chicken, so the egg came first.
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i have a book that i can sell you. it has all the diagrams and labels of the developmental stages of a chick embryo, as well as humans, echinoderm, etc. let me know if you want to buy it. it was only used a couple of times in class.
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Maybe it's called mitosis or meiosis. Stages are different