Eggs of various birds, a [[turtle, various cartilaginous fish, a cuttlefish and various butterflies and moths. (Click on image for key)|right|thumb|link=File:Adolphe_Millot_oeufs-fixed.jpg#Key]]
AI overview
An egg is a reproductive cell or structure produced by certain animals, including birds, turtles, fish, cuttlefish, and insects like butterflies and moths. Eggs matter because they are how many animal species reproduce and develop new generations.
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Article
27 sectionsContents
- Eggs of different animal groups
- Fish and amphibian eggs
- Amniote eggs and embryos
- Bird eggs
- Shell
- Shape
- Colours
- Predation
- Mammalian eggs
- Invertebrate eggs
- Evolution and structure
- Formation
- Scientific classifications
- Egg size and yolk
- Microlecithal
- Mesolecithal
- Macrolecithal
- Egg-laying reproduction
- Human use
- Food
- Eggs and Kashrut
- Vaccine manufacture
- Culture
- Collecting
- See also
- References
- External links
Eggs of various birds, a [[turtle, various cartilaginous fish, a cuttlefish and various butterflies and moths. (Click on image for key)|right|thumb|link=File:Adolphe_Millot_oeufs-fixed.jpg#Key]]
An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell – a zygote. Within the vessel, an embryo is incubated until it has become an animal fetus that can survive on its own, at which point the animal hatches. Reproductive structures similar to the egg in other kingdoms are termed "spores", or in spermatophytes "seeds", or in gametophytes "egg cells".