An pagkakaiba han mga rebisyon han "Hayop"

Haros natanan na hayop naagi sin durudilain na porma sin [[sexual]] na reproduksyun.<ref>{{cite book|last=Knobil|first=Ernst|title=Encyclopedia of reproduction, Volume 1|year=1998|publisher=Academic Press|isbn=978-0-12-227020-8|page=315}}</ref> May'adada an hayop sin pipira na ''specialized'' na ''[[Gamete|reproductive cells]]'', na naagi sin ''[[meiosis]]'' para magin [[spermatozoon|spermatozoa]] ug magin [[ovum|ova]].<ref>{{cite book|last=Schwartz|first=Jill|title=Master the GED 2011 (w/CD)|year=2010|publisher=Peterson's|isbn=978-0-7689-2885-3|page=371}}</ref> Nagtitig'ub an spermatozoa ngan ova para mabug'os an [[zygote]], na nagiging bag'o na indibiduwal.<ref>{{cite book|last=Hamilton|first=Matthew B.|title=Population genetics|year=2009|publisher=Wiley-Blackwell|isbn=978-1-4051-3277-0|page=55}}</ref>

Sugad man, daramo na hayop an may kakayahan sin [[asexual]] na reproduksyon.<ref>{{cite book |last1=Adiyodi |first1=K. G.|last2=Hughes |first2=Roger N. |last3=Adiyodi |first3=Rita G. |title=Reproductive Biology of Invertebrates, Progress in Asexual Reproduction, Volume 11 |year=2002 |publisher=Wiley |page=116}}</ref>