411 REFERENCE · Wikibooks
Dichotomous Key/Mammalia
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Mammalia Animalia Chordata Vertebrata Mammal ../Actinistia/ - ../Actinopterygii/ - ../Amphibia/ - ../Aves/ - ../Chondrichthyes/ - ../Dipnoi/ - ../Mammalia/ - ../Petromyzontidae/ - ../Reptilia/ Subclasses ../Marsupialia/ - ../Monotremata/ - ../Placentalia/
1
Egg:A zygote, resulting from fertilization of the ovum
Birth
Eggs - ../Monotremata/
Live birth - 2
2
Development of young
In a marsupium - ../Marsupialia/
In a uterus with a placenta - ../Placentalia/
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