What is Direct development?
'''Direct development''' is an idea in [[biology]]. An animal does direct development if the baby animal looks like a small adult and not a [[larva]].<ref name=Paper>{{cite journal|url=https://www.tandfonline.com/doi/abs/10.1080/00222933.2021.1895349|accessdate=March 7, 2023|title=Direct development of the bush frog Raorchestes longchuanensis (Yang and Li 1978) under laborary conditions in Southern China|journal=Journal of Natural History|pages=123–132|author1=Fang Yan|author2=Xiaolong Liu|author3=Yinpeng Zhang|author4= Zhiyong Yuan|date=May 28, 2021|volume=55 |issue=1–2 |doi=10.1080/00222933.2021.1895349|s2cid=236202923 |type=Abstract}}</ref> A frog that hatches out of its egg as a small frog has direct development. A frog that hatches out of its egg as a [[tadpole]] does not. An insect that hatches out of its egg as a small adult does direct development. An insect that hatches out of its egg as a caterpillar or grub does not. Direct development is the opposite of [[complete metamorphosis]]. An animal does complete metamorphosis if it becomes a non-moving thing, for example a [[pupa]] in a [[cocoon]], after being a larva but before being an adult.<ref name=Morph>{{cite journal|title=Complete metamorphosis of insects|author1=Jens Rolff|author2= Paul R. Johnston|author3= Stuart Reynolds|doi=10.1098/rstb.2019.0063|date=August 26, 2019|pmid= 31438816|volume=374|issue=1783|journal=Philos Trans R Soc Lond B Biol Sci. |pmc=6711294 |type=full text}}</ref> ==Examples== *Most frogs in the genus ''[[Callulina]]'' hatch out of their eggs as small frogs. They are never [[tadpoles]]. *[[Springtails]] and [[mayflies]] are never larva. They are called [[ametabolous]] insects.<ref name=Gil>{{cite book|accessdate=March 19, 2023|url=https://www.ncbi.nlm.nih.gov/books/NBK9986/|title=Developmental Biology|edition=6|author=Scott F. Gilbert|location=Sunderland, MA |publisher=Sinauer Associates|year= 2000|chapter= Metamorphosis: The Hormonal Reactivation of Development}}</ref> ==References== {{reflist}} [[Category:Biology]]