how do jellyfishes have babies and how many each time?
438246
Small buds appear on the ends of thier tentacles, these buds break off and grown into small jellyfish...
655003
When the egg and the sperm fuse (in sexual reproduction) a single cell is formed.  That cell divides and divides and keeps on dividing until a full sized critter or plant is formed.\n\nSingle celled creatures reproduce by splitting in half to make two new critters.
747112
from original cell 2 from those (daughter cells)  they each split again which results in 4 cells...hope this helps...the question is hard to understand
935305
they have hair, are chordates, mammary glands, produce live offspring
432140
They produce eggs and sperm which they secrete into the water.  They then mix to fertilize the eggs.  They never actually come in direct contact with one another.
134428
depends on what kind of babies you mean. Baby chicks for example hatch from eggs. Everyone knows storks bring baby humans.
352895
Here is what i found for you:\n\nThe Life Cycle of the Carribian Hermit Crab\n\n The reproductive organs of hermit crabs are located near and just below the crab’s heart and open to the outside at the base of the last pair of walking legs in the male. In the female, they’re located at the base of the middle pair of walking legs. Female hermit crabs usually lay their eggs shortly after copulating,  however they can also store sperm for many months. The eggs are fertilized as they are laid by passing through the chamber holding the sperm. The eggs are carried and hatched in a mass attached to the abdomen inside the shell.\n\n      The number of eggs is usually large, but depends on the crab’s size. The developing crabs go through four stages, two of which (the baupilus and protozoea) occur while still in the egg. Most crabs hatch at the third stage, the zoea. This is a larvae stage wherein the crab has several long spines, a long narrow abdomen, and large fringed antennae. The fourth stage of development is the magelops.\n\n      Hermit crabs are usually born in the ocean, near the shore. Because of this, hermit crabs cannot reproduce in captivity. After the crabs are born, they move inland away from the water, where they search for abandoned shells to inhabit. Hermit crabs then begin growing and developing through a process call molting. In this process, the crabs sheds their exoskeleton. During this, the crabs are extremely vulnerable and inactive, and usually find protection by burrowing in the ground. It takes around 10 days for their new exoskeleton to harden, and during this period the crab is able to regenerate any lost or broken claws or legs. A hermit crab can molt as often as every other month when they’re young, or every 18 months when they’re older. The life span of the hermit crab in the wild is up to 30 years, while those in captivity live 15 years at the most.\n\nTC
1031791
Ovoviviparous animals develop within eggs that remain within the mother's body up until they hatch or are about to. This strategy of birth is known as ovoviviparity. It is similar to vivipary in that the embryo develops within the mother's body. Unlike the embryos of viviparous species, ovoviviparous embryos are nourished by the egg yolk rather than by the mother's body. However, the mother's body also provides for gas exchange.\n\nOvoviviparity is employed by many fish (including sharks), reptiles, and invertebrates. The young of ovoviviparous amphibians are sometimes born as larvae, and undergo metamorphosis outside the body of the mother.
193970
>Reproduction occurs both sexually and by asexual budding. Sexual reproduction is by means of eggs and sperm, which are produced in the mesentaries and shed into the water. Fertilization results in a free-swimming larva, which attaches to a surface and secretes a skeleton, becoming (in colonial forms) the parent of a new colony.
668486
What does a jellyfish have to do with hair?????????????
812272
Some fish have internal, some have external! You are obviously just talking about "oviparous fishes."  (There are some fishes with "gonopodia" which are penis-like fins that penetrate the side of the female and are used as an intromittent organ.  Look up molley and platty MATING-PARING sexual behaviors.) These fish mate (not just breed with a spawning) and are ovoviviparous and give "birth." (not true birth like placental mammals.)\n\nThe zygote of oviparous anamniotes, however, is generally NOT that safe in the water!  The very high number of eggs-sperm usually released-spawned and fertilized, however, helps the odds of some of the eggs surviving thru development.  The mucus nature of anamniotic eggs helps prtect some, but not that much.  The eggs are vulnerable to fungus and bacterial infection and to predation by other organisms. \n\nThere is a huge array of behaviors that many different species of fishes use to help protect their broods. Some are mouth brooders, some lay them clinging to rocks, into the sand or into crevices.  Some lay them and stay nearby fanning them and guarding them.  Eggs of seahorses are laid into the pouch of the male and he gives "birth." If you go thru ichthyology books, websites and investigate parental care of broods, you will come up with a HUGE range of behaviors exhibited by the various species of fishes.  Even some species of sharks lay eggs, but their eggs are often camoflauged in the seaweed or along the ocean bottom.
1184651
They only hold the eggs in a special sac, until they hatch.  (I think seahorses are egglayers.)  Once the young seahorses are ready to lead independent lives, he dumps them out of the sac.\n\nI think it is comparable to the way male emus incubate the eggs of their partners.  Male emus (an Australian bird, similar to the ostrich and rhea) also cares for the young; they follow him, for a while after hatching.\n\nSee?  The females lay eggs / give birth, really.  These males just participate in care of their offspring.  Their babies are thus more likely to grow up and have offspring; the trait has selective advantages.\n\nIn general, females put a lot more into young than males do.  In some species, the way "female" is distinguished from "male" is by comparing the size of their gametes.  Note how sperm are smaller than ova, for example.  In many cases, the female adds a huge load of nutrients to the young, too; the yolk + / or white of the egg, the placental nutrition of the foetus, the milk of mammals...  It all weakens the females, in cases where nutrients are limiting (which is the normal situation, "in the wild".\n\nIn cases where males take on the bulk of after - care, it just evens the load a bit, really.  It lets the females get back to replenishing their body nutrients, to get ready for the next brood.... probably sired by the same male.  (He wins again.)
167524
This is a highly loaded question.  At least you are up front about your intentions.\n\nThe beginning of life is subjective. Not all species follow the same rules.\n\nTake for example a jellyfish. When a jellyfish releases spermatozoa and eggs, these combine to form a planula. This is technically a living cluster of cells. It has no nervous system, no perception, no way to feed, or direct its movement. As it drifts through the water it develops further and has rudimentery chemical senes that will ultimately tell it where to settle and begin its next phase of life.\n\nA mammal is a cluster of cells a few days after conception. These are undifferentited stem cells. They have not yet begun to differentiate. An embryonic dog looks like an enbryonic whale at this stage. It is very fragile and any number of problems will cause it to self terminate and stop growing. It cannot survive without its host, and has no brain or nervous system to be conscious or self aware.  In the case of humans, whose gestation is about 42 weeks, at about week 12, the fetus now has a rudimentery circulatory system and a beating heart. This system now is responsible for delivery nutrients provided by the host (mom) and removing waste products. Any earlier and the fetus/embryo is  in early development. In many cases if you were showed any mammal at the same stage you could not tell a mouse from a dog from a human at 4, 6, or 8 weeks. Even an embryonic fish at 2 weeks looks like a human at 3 weeks. If you had to put a date on this type of question, then 12 weeks seems reasonable. Another perspective is when a fetus could survive outside the uterus, which is about 26 to 30 weeks. In some cases slightly earlier. The nervous system begins development around week 10 to 14 and for all purposes is not finished until about 2.5 years of age. The brain and spinal chord are not cohesive until about 16 t 20 weeks and there are no sensory systems or pain receptors until closer to 30 weeks. Even at birth, newbornes are only semi conscious as their brains interpret the new environment.\nIn short, you cannot accurately and faily put a number on this. Esecially when it comes to a womans right to dictate how her bidy is used. Pregnancy is much like a parasitic infection. Forcing a mother to be a host to this is as cruel as terminating a pregnancy. Prevention is far better and education and access to reliable methods and information should be everyones goals. But you cannot expect the number of pregnancy terinations to go down if you do not educate kids about sex and provide confidential access to birth control.
390964
4 set of quadruplets.\n\nShe was pregnant 27 times and gave birth to 69 children including 16 twins, 7 triplets and 4 quadruplets.
541847
Multimammate rats (also called multimammate mice) in the genus Mastomys have 24 nipples.  Litters sizes are often greater than 12 per female (though each female could presumably manage 24 offspring).  Sexual maturity is reached in 50-60 days.  They can get pregnant again right after birth.  Gestation is just over 30 days.\n\nSo, assuming a 50-50 sex ratio, no mortality, and unlimited resources, a single reproductive pair could generate a population size of 268,586 in one year.
784408
Chimeras are formed from four parent cells (two fertilized eggs or early embryos are fused together) or three parent cells (a fertilized egg is fused with an unfertilized egg or a fertilized egg is fused with an extra sperm). Each population of cells keeps its own character and the resulting animal is a mosaic of mis-matched parts. An analogy is two jigsaw puzzles cut using an identical cutter, but with different pictures. A single puzzle can be made out of the mis-matched parts, but the completed puzzle will show parts of both different pictures. The likelihood of a child being a chimera is increased if the child is created via in vitro fertilization. Chimeras can often breed, but the fertility and type of offspring depends on which cell line gave rise to the ovaries or testes.
837176
hookworms and liver flukes are parasites. Leeches might be considered parasites as well, but I'm not sure, the others I am sure of. I think the jellyfish and corals mostly eat zooplankton, that is fish ova and other tiny marine organisms. Sorry I can't help you more.\n\n16 NOV 06, 0339 hrs, GMT.