Reproduction In theosophical writing, usually confined to the various modes of physical procreation and excluding the production of offspring by kriyasakti.

The essential principle in natural reproduction is that an individual separates a portion of itself, which then evolves independently into a similar individual. This may occur by fission, as in the amoeba and other unicellular forms, the mode of the first root-race of humanity. Or by budding, as in the sea anemone and many plants, and in the second root-race. By the throwing off of spores, as occurs in mosses and fungi.

By the production of an egg, hatched within or without the body; the egg may contain the so-called positive and negative reproductive elements, and so be self-fertilizing; or it may contain only the negative element and so require fertilizing. The positive element may be contributed by the same individual as supplies the negative element; and then we have hermaphroditism. Or the positive and negative elements may be in different individuals, and we have the present usual mode of reproduction.

The human body has at one time or another passed through all these states. Part of the second and the earlier third root-race were hermaphroditic, and the later third practiced ordinary sexual reproduction. Mankind is destined to transcend the present mode, which is but a passing phase in evolutionary history, and then pass to modes analogous to the modes which obtain on the descending arc.

(See also: Reproduction, Mysticism, Mysticism Dictionary)

See also:

Sexual reproduction, Sexual reproduction - Sexual reproduction of protists and fungi, Sexual reproduction - Reproduction in flowering plants, Sexual reproduction - Reproduction in reptiles, Sexual reproduction - Reproduction in birds, Sexual reproduction - Reproduction in mammals, Sexual reproduction - The mammalian male, Sexual reproduction - The mammalian female, Sexual reproduction - Gestation, Sexual reproduction - Birth, Sexual reproduction - Monotremes, Sexual reproduction - Marsupials, Sexual reproduction - Origin of Sexual Reproduction

Read more here: » Sexual reproduction: Encyclopedia II - Sexual reproduction - Reproduction in mammals

Sexual reproduction is a biological process by which organisms create descendants that have a combination of genetic material contributed from two (usually) different members of the species. Each of two parent organisms contributes half of the offspring's genetic makeup by creating haploid gametes. Most organisms form two different types of gametes. In these anisogamous species, the two sexes are referred to as male (producing sperm or microspores) and female (producing ova or megaspores). In isogamous species the ...

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Biological reproduction, Biological reproduction - Asexual reproduction, Biological reproduction - Sexual reproduction, Biological reproduction - Mitosis and Meiosis, Biological reproduction - Reproductive strategies, Biological reproduction - Asexual vs. sexual reproduction, Biological reproduction - The Red Queen hypothesis, Biological reproduction - Life without reproduction, Biological reproduction - Mechanical reproduction

Read more here: » Biological reproduction: Encyclopedia II - Biological reproduction - Sexual reproduction

Biological reproduction is the biological process by which new individual organisms are produced. Reproduction is a fundamental feature of all known life; each individual organism exists as the result of reproduction by an antecedent. The known methods of reproduction are broadly grouped into two main types: sexual and asexual reproduction. In asexual reproduction, an individual can reproduce without involvement with another individual of that species. The division of a bacterial cell into two daughter cells is an example of as ...

Including:

• Biological reproduction - Asexual reproduction
• Biological reproduction - Sexual reproduction
• Biological reproduction - Mitosis and Meiosis
• Biological reproduction - Reproductive strategies
• Biological reproduction - Asexual vs. sexual reproduction
• Biological reproduction - The Red Queen hypothesis
• Biological reproduction - Life without reproduction
• Biological reproduction - Mechanical reproduction

Read more here: » Biological reproduction: Encyclopedia - Biological reproduction

Asexual reproduction (also known as agamogenesis) is the simplest form of reproduction and does not involve meiosis, gamete formation, or fertilization. In laymen's terms, there is only one "parent" involved. This form of reproduction is common among simple organisms such as amoeba and other single-celled organisms, although most plants produce asexually as well (see vegetative reproduction). Because it does not require male and female participation, asexual reproduction occurs faster than sexual reproduction and ...

Including:

• Asexual reproduction - Advantages and disadvantages

Read more here: » Asexual reproduction: Encyclopedia - Asexual reproduction

Clownfish are protandrous hermaphrodites, meaning they are hatched as sexually immature fry. Based on signals from their environment and being physically mature (12-24 months) they will either remain sexually immature, change into a male or change into a male then female. A group of clownfish is always built into a hierarchy of this type, with the female (the largest and most aggressive) at the top. The change from juvenile to male, and male to female is irreversible. If the female should die or be removed from the group, the most dominant male then changes into a female, and the rest of ...

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Clownfish, Clownfish - Reproduction, Clownfish - References in media

Read more here: » Clownfish: Encyclopedia II - Clownfish - Reproduction

Daphnia reproduce parthenogenetically usually in the spring till the end of the summer. One or more juvenile animals are nurtured in the brood pouch inside the carapace.The newly hatched Daphnia must molt several times before they are fully grown into an adult usually after about two weeks. The young are small copies of the adult; there are no true nymphal or instar stages. The fully mature females are able to produce a new brood of young about every ten days under ideal conditions. The reproduction process continues while the environmental ...

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Daphnia, Daphnia - Biology, Daphnia - Reproduction, Daphnia - Lifespan

Read more here: » Daphnia: Encyclopedia II - Daphnia - Reproduction

It has a diploid life cycle which includes both sexual and asexual reproduction. In the asexual phase, a spore of Saprolegnia will release a primary zoospores. Within a few minutes, this zoospore will encyst, germinate and release another zoospore. This second zoospore has a longer cycle during which most dispersal happens; it will continue to encyst and release a new spore in a process called polyplanetism until it finds a suitable substrate. When a suitable medium, is located, the hairs surrounding the spore will lock onto the substrate so ...

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Saprolegnia, Saprolegnia - Habits, Saprolegnia - Reproduction, Saprolegnia - Characteristics of Infection, Saprolegnia - Other sites

Read more here: » Saprolegnia: Encyclopedia II - Saprolegnia - Reproduction

Lichens most frequently reproduce asexually, either by vegetative reproduction or through the dispersal of diaspores containing algal and fungal cells. Soredia (sing. soredium) are small groups of algal cells surrounded by fungal filaments that form in cavities called soralia, which open when the lichen dries or surrounding tissues die and release the soredia to be dispersed by wind. Another form of diaspore are isidia, elongated outgrowths from the thallus that break off for dispersal. Fruticose lichens in particular can easily fragm ...

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Lichen, Lichen - Morphology and structure, Lichen - Reproduction, Lichen - Ecology, Lichen - Classification

Read more here: » Lichen: Encyclopedia II - Lichen - Reproduction

Lichens most frequently reproduce asexually, either by vegetative reproduction or through the dispersal of diaspores containing algal and fungal cells. Soredia (sing. soredium) are small groups of algal cells surrounded by fungal filaments that form in cavities called soralia, which open when the lichen dries or surrounding tissues die and release the soredia to be dispersed by wind. Another form of diaspore are isidia, elongated outgrowths from the thallus that break off for dispersal. Fruticose lichens in particular can easily fragm ...

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Lichen, Lichen - Morphology and structure, Lichen - Reproduction, Lichen - Ecology, Lichen - Growth Form

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Apart from their importance from the economic standpoint, Aphids are chiefly remarkable for the phenomena connected with the propagation of the species. For part of all of their life, aphids are often found to be parthenogenetic. Aphids have been known to have what is called telescoping generations. With telescoping generations the female aphid will have a daughter within her who is already parthenogenetically producing its own daughter at the same time. At different times of the year, they can be viviparous or oviparous. During spring and s ...

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Aphid, Aphid - Anatomy, Aphid - Diet, Aphid - Reproduction, Aphid - Evolution

Read more here: » Aphid: Encyclopedia II - Aphid - Reproduction

Nuclear division is often coordinated with cell division. This generally takes place by mitosis, a process which allows each daughter nucleus to receive one copy of each chromosome. In most eukaryotes there is also a process of sexual reproduction, typically involving an alternation between haploid generations, where only one copy of each chromosome is present, and diploid generations, where two are present, occurring through nuclear fusion (syngamy) and meiosis. There is consid ...

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Eukaryote, Eukaryote - Structure, Eukaryote - Internal membranes, Eukaryote - Mitochondria and plastids, Eukaryote - Cytoskeletal structures, Eukaryote - Reproduction, Eukaryote - Origin and evolution

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Mating is thought to occur at or below 1,000 metres depth. In the darkness, whether mating is successful or not may depend on the female; she can choose whether to signal the male with her circumoral photophore. The light emitted by the photophore is believed to be of a specific wavelength, possibly both preventing miscommunication and the attraction of predators. After mating the female then rises to about 800 metres to brood. Her eggs are interconnected by a number of stalks; the whole mass is held safely by means of suckers near he ...

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Bolitaenidae, Bolitaenidae - Physical description, Bolitaenidae - Habitat, Bolitaenidae - Reproduction, Bolitaenidae - Species

Read more here: » Bolitaenidae: Encyclopedia II - Bolitaenidae - Reproduction

Some anglerfish have a unique mating method. Without light, finding a mate is a problem, especially at a time when both individuals are ready to spawn. When scientists first started capturing ceratioid anglerfish, they noticed that all of the specimens were females. These individuals were a few inches in size and almost all of them had what appeared to be parasites attached to them. It turned out that these "parasites" were the males. When a male anglerfish is hatched, he has extremely well developed olfactory organs that detect scent ...

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Anglerfish, Anglerfish - Predation, Anglerfish - Reproduction

Read more here: » Anglerfish: Encyclopedia II - Anglerfish - Reproduction

Ambrosia is a monoecious plant, i.e. it produces separate male and female flower heads on the same plant. The numerous tiny male, yellowish-green disc flower are about 3 mm in diameter. They grow in a terminal spike, subtended by joined bracts. The female, whitish-green flowers are 1-flowered and are inconspicuously situated below the male ones, in the leaf axils. The pappus is lacking. After pollination, the female flowers develops into a prickly, ovoid burr with 9-18 straight spines. It contains one arrowhead-shaped seed, brown when ...

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Ragweed, Ragweed - Reproduction, Ragweed - Allergen, Ragweed - Control and Eradication, Ragweed - Species

Read more here: » Ragweed: Encyclopedia II - Ragweed - Reproduction

For the purpose of reproduction most amphibians are bound to fresh water. A few tolerate brackish water, but there are no true sea water amphibians. Several hundred frog species in adaptive radiations (e.g., Eleutherodactylus, the Pacific Platymantines, the Australo-Papuan microhylids, and many other tropical frogs), however, do not need any water whatsoever. They reproduce via direct development, an ecological and evolutionary adaptation that has allowed them to be completely independent from free-standing water. Almost all of these frogs l ...

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Amphibian, Amphibian - History of amphibians, Amphibian - Classification, Amphibian - Reproduction, Amphibian - External references

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Mantids are also known to be cannibals. They are not only known to eat other insects, but also other mantids, sometimes even their mating partners (though the frequency of this is often overstated). During the mating season, which typically begins in autumn, male mantids are cautious when approaching female mantids. The male usually approaches from behind and hangs onto the female's back with his front legs. He then deposits and stores sperm cells into a special chamber in the female abdomen. The danger may occur during the mating process or ...

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Mantodea, Mantodea - Reproduction, Mantodea - Human perceptions, Mantodea - Conservation status, Mantodea - History, Mantodea - Sources

Read more here: » Mantodea: Encyclopedia II - Mantodea - Reproduction

The porbeagle is ovoviviparous. Gestation period is about 8 to 9 months. Litters of up to 6 pups have been recorded but the normal size is about 4. Pups are about 60 to 80 cm long when born. Female porbeagles reaches sexual maturity at about 12 to 13 years and males at 7 to 8 years. ...

See also:

Porbeagle, Porbeagle - Distribution, Porbeagle - Habitat, Porbeagle - Anatomy and appearance, Porbeagle - Diet, Porbeagle - Reproduction, Porbeagle - Other denominations

Read more here: » Porbeagle: Encyclopedia II - Porbeagle - Reproduction

Breeding usually takes place in early spring. Females excavate a den ready for between one and four young to be born in May. The male plays no part in raising the young and may even kill them. A common scene in late spring and summer is a mother skunk followed by a line of her kits. By late July or August the young disperse. When the young skunks meet again, they raise their tails vertically. After a little posturing they start to rub against each other, often rolling around in what appears to be an embrace. Older skunks ...

See also:

Skunk, Skunk - Description, Skunk - Behavior, Skunk - Feeding, Skunk - Reproduction, Skunk - Removing the smell of skunk

Read more here: » Skunk: Encyclopedia II - Skunk - Reproduction

Caecilians are the only order of amphibians which only use internal insemination. The male Caecilians have a penis-like organ, the phallodeum, which is inserted into the cloaca of the female for 2 to 3 hours. About 25% of the species are oviparous (egg-laying); the eggs are guarded by the female. For some species the young Caecilians are already metamorphed when they hatch, other hatch as larvae. The larvae aren't fully aquatic, but spe ...

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Caecilian, Caecilian - Anatomy, Caecilian - Distribution, Caecilian - Reproduction, Caecilian - Origin of the name, Caecilian - Taxonomy, Caecilian - Misc

Read more here: » Caecilian: Encyclopedia II - Caecilian - Reproduction