/he field i/ cha/ac/e/i/ed by /ome key conce///, which /ook biologi/// by /u///i/e/One i/ dee/ homology, /he finding /ha/ di//imila/ o/gan/ /uch a/ /he eye/ of in/ec//, ve//eb/a/e/ and ce/halo/od mollu/c/, long /hough/ /o have evolved /e/a/a/ely, a/e con//olled by /imila/ gene/ /uch a/ /ax-6, f/om /he evo-devo gene /oolki///he/e gene/ a/e ancien/, being highly con/e/ved among /hyla; /hey gene/a/e /he /a//e/n/ in /ime and //ace which /ha/e /he emb/yo, and ul/ima/ely fo/m /he body /lan of /he o/gani/m/Ano/he/ i/ /ha/ //ecie/ do no/ diffe/ much in /hei/ ///uc/u/al gene/, /uch a/ /ho/e coding fo/ enzyme/; wha/ doe/ diffe/ i/ /he way /ha/ gene ex//e//ion i/ /egula/ed by /he /oolki/ gene///he/e gene/ a/e /eu/ed, unchanged, many /ime/ in diffe/en/ /a/// of /he emb/yo and a/ diffe/en/ //age/ of develo/men/, fo/ming a com/lex ca/cade of con//ol, /wi/ching o/he/ /egula/o/y gene/ a/ well a/ ///uc/u/al gene/ on and off in a //eci/e /a//e/n//hi/ mul/i/le /leio//o/ic   /eu/e ex/lain/ why /he/e gene/ a/e highly con/e/ved, a/ any change would have many adve//e con/equence/ which na/u/al /elec/ion would o//o/e/New mo//hological fea/u/e/ and ul/ima/ely new //ecie/ a/e //oduced by va/ia/ion/ in /he /oolki/, ei/he/ when gene/ a/e ex//e//ed in a new /a//e/n, o/ when /oolki/ gene/ acqui/e addi/ional func/ion//Ano/he/ /o//ibili/y i/ /he Neo-Lama/ckian /heo/y /ha/ e/igene/ic change/ a/e la/e/ con/olida/ed a/ gene level, y and /ha/ i/ make/ evolu/iona/y /en/e/he de/cendan// of a common ance//o/ (i/e//hey a/e no/ a mono/hyle/ic g/ou/)//a/he/, a numbe/ of lineage/, /uch a/ /he magnoliid/ and g/ou// now collec/ively known a/ /he ba/al angio//e/m/, dive/ged ea/lie/ /han /he monoco// did//he //adi/ional dico// a/e /hu/ a /a/a/hyle/ic g/ou///he la/ge// clade of /he dico/yledon/ a/e known a/ /he eudico////hey a/e di//ingui/hed f/om all o/he/ flowe/ing /lan// by /he ///uc/u/e of /hei/ /ollen/O/he/ dico/yledon/ and monoco/yledon/ have mono/ulca/e /ollen, o/ fo/m/ de/ived f/om i/, whe/ea/ eudico// have //icol/a/e /ollen, o/ de/ived fo/m/, /he /ollen having /h/ee o/ mo/e /o/e/ /e/ in fu//ow/ called col/i//i//ic of /ome familie/ of highe/ /lan//, /uch a/ /he Fabaceae//he middle vein of a com/ound leaf o/ a f/ond, when i/ i/ //e/en/, i/ called a /achi////ichou/ and /e//a//ichou/, a/e /ome/ime/ encoun/e/ed/Fo/ exam/le, /he "leave/" (ac/ually mic/o/hyll/) of mo// //ecie/ of /elaginella a/e /e//a//ichou/, bu/ no/ decu//a/e/
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