Examples of animals that are reproducing externally and internally?
82214
Fertilization is of 2 types \n 1.External:Animals living inside water have  external Fertilization . for example Fishes,& Amphibian like Frog,Toad,Salamander,Newt & Hyla etc. \n2.Internal: True land animals reproduce internally .For example Reptiles like Snakes & turtle ,Birds like Kiwi,Ostrich,Mammals like Man,elephant, etc.
392040
Hope this sheds some light on it jessica.\n\n\nREPRODUCTION\n\nMost fishes are egg-layers, but many bear living young. Live-bearing fishes may be ovoviviparous, in which the eggs essentially simply hatch within the female, or viviparous, in which the unborn young are supplied nourishment through the mother's tissues. In some ovoviviparous fishes the embryo develops in the egg while the egg is still within its follicular covering within the ovary, and ovulation (or release of the egg) and birth occur at the same time. In other ovoviviparous forms the eggs are released from the protective follicles into the cavity of the hollow ovary, where development continues. In some viviparous fishes the walls of the egg follicle are in intimate contact with the embryo, supplying it with nourishment. In the viviparous sharks, a part of the oviduct, or egg channel, is developed into a uterus, where the modified yolk sacs of the young are closely joined to pockets within the uterus.\n\nIn live-bearing fishes and in some egg-layers, fertilization occurs internally, and methods have been evolved for introducing the sperm into the female's body. In sharks the pelvic fins of the male are modified into intromittent organs called myxoptergia, and in the male topminnows the anal fin is modified into a similar-functioning intromittent organ called the gonopodium.\n\nAt least three modes of reproduction--heterosexual, hermaphroditic, and parthenogenetic--are found in fishes. In the most common form, heterosexual reproduction, there are separate male and female parents, but even here there is considerable variation. In some live-bearing fishes, the female is able to store sperm for up to 8 or even 10 months, and this sperm is used to fertilize new batches of eggs as they develop. In some cases, a female may carry sperm from several males at once.\n\nIn hermaphroditic reproduction, a single fish is both male and female, produces both eggs and sperm (either at the same time or at different times), and mates with other similar hermaphroditic fishes. External self-fertilization occurs in one hermaphroditic fish, which sheds egg and sperm simultaneously. In another, internal self-fertilization may occur. In certain fishes there is a time sequence of hermaphroditism, young fishes reversing their sex as they grow older.\n\nIn parthenogenetic reproduction, unfertilized eggs develop into embryos. This is known to exist in at least one fish species, Poecilia formosa, of the Amazon River; however, even though development proceeds without fertilization in some of these females, mating with a male is still required to stimulate egg development.\n\nParental care also shows great diversity. Some fishes, like the Atlantic herring, form huge schools of males and females and freely shed their eggs and sperm (milt), and then abandon the eggs. Other fishes build nests and care for both the eggs and newly hatched young. Others have evolved methods of carrying the eggs with them, commonly in their mouths, but also in gill cavities or in special pouches on the body.
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I think a great deal more needs to be done in animal cloning before humans get involved. Besides the ethical issues, there are real physiological difficulties that seem to erupt in cloned organisms. It seems that having two sets of genetic material really is important.
997614
It's the most likely skeptic's explanation. However, parthenogenesis does happen sporadically in higher animals, and rarity of such an event would satisfy both the scientists and the believers (who would claim it as a miracle).
814382
animal testing\neuthanasia\nabortion\ncloning\nstem cell research
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It is growing fish in artificial environments, for release into the natural environment. Trout hatcheries for example.
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Just one. \n\nVery few animals produce more than one offspring per egg.
40335
Some reptile species are parthenogenetic (from Greek: virgin + originate, generate). That is, the development of the ovum can be triggered without sperm intervention.\nAs a consequence, these populations are only formed by females and all the offspring are genetically identical to their mothers (unless there is some recombination at cross-over, which I'm not sure about). \nThere are only a few lizards and snakes that present this mechanism; see the links below for the best known parthenogenetic snake species (there are probably others that have not been studied yet). \nHere in Argentina we have some parthenogenetic lizards! :)
201240
Well, every animal has it's own set of stats.  I suggest you google a bit.
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In most birds and reptiles, an egg (Latin ovum) is the zygote, resulting from fertilization of the ovum. It nourishes and protects the embryo. Oviparous animals are animals that lay eggs, with little or no other development within the mother. This is the reproductive way of many fish, amphibians and reptiles, all birds, the monotremes, and most insects and arachnids.\n\nSince there are well over 800,000 species of insects I'd say oviparity is the way the largest number of animal species reproduce.
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some can, depends on the species
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Pit bulls,mountain goats,cats and monkeys
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I have been looking - found a pig example (w/ photo) at source 1,\nthen source 2
77951
There are many different types of "sex" practiced in the plant and animal kingdoms besides the type we humans are familiar with. There are species in which the fathers get pregnant (like seahorses). There are species where males will turn into females (or vice-versa) if it would help the species survive. There are lots of examples of parthenogensis (virgin birth). There are cases where a single individual (like a plant) will pollinate itself, but others where biology tries to prevent this, although the plant might be hermaphroditic. There are plants which have several different reproduction mechanisms; a piece of the root can produce a new individual, for example. Some organisms can engage in both sexual and asexual reproduction as well; earthworms, honeybees, and geckos can asexually reproduce. There are species with 3 or even more sexes (like the clam shrimp in the US, for example, which has 3 sexes, or possibly  the New Zealand lizard the tuatara, which appears to have 4 sexes. There are species where males just fertilize the eggs deposited by the female in some location (most fish). Bacteria and viruses reproduce in strange ways, by dividing, or by taking over the reproduction mechanism of some other organism. \n\nThe astounding variety of "sex" and/or reproduction just goes on and on and on. We are still learning about the amazing diversity of life on this planet. \n\nIf and when we ever discover life on other planets, you can be sure that they will have different ways to reproduce, that may or may not have anything to do with what we might recognize as sex, and probably using mechanisms we cannot even imagine.
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Human cloning is practically possible. That is ,it can be done. But the actual human cloning is at present; illegal.\nAt the same time animal cloning has not even been perfected. Only 1 or 2 offsprings are gotten from about 100 experiments.
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Yes, the ambience is quite congenial for animal living. The rare species among them are being propagated within the ecological limitations.
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It is a fastinating animal, from Australia.  It is not the result of any cross breeding.  It is distinct, one of a kind.