alexei severtsov

alexei nikolevic severtsov (; 11 sitambar 1866-16 disambar 1936) ack russie aur soviyat vikaasvaadi prani vigyaani they jinhone tulanaatmak shareer rachana aur aakriti vigyaan parr kaam kiya. vaha prani vigyaani nikolai severzov kaa putra thaa. unhone kasheruki jeevon key vikas kaa adhyayan kiya aur vikaasvaadi rupankan key liye ack sansthaan kii sthaapana kii, jiska naam abb unake naam parr paaristhitiki aur vikas key ack sevartsov sansthaan key roop mein rakhaa gayaa haye. unhone phyloambriology aur vikaasvaadi shareer vigyaan kii vibhinn avadhaaranaon koo pesh kiya.
jeevani.
sevartsov kaa janm masco mein huaa thaa jahan unake pitaa prani vigyaani nikolai severtzov they. petrov mein niji schooly shiksha key baad, boronez governor mein bobrowski uazed, way 1885 mein lomonosov vishvavidyalaya gaye aur 1895 mein snaatak hue. prabhaavshaali shikshakon mein pee shamil they. pee. sushkin, aim. aeye. menzbir, aaee. aim. sechenov, key. aeye. timiriyaazev, aur vee. vee. markovnikov. menzbir ney salah dee kii vaha chitrakaari seekhata haye aur phir usane prasiddh kalakar aine seey sabak liya. aeye. martinov. sevartsov ney apane kalaatmak kaushal kaa upayog naa kewal vaigyaanik chitra banaane key liye kiya, balki kalaatmak karyon key saath-saath goethe key "fost" key drishyon key liye chitron aur apani khud kii purry kathaaon key liye bhee kiya. isake baad unhone willefranche-sur-meir, napples aur germany mein samudri jeev vigyaan prayogshalaon mein kaam kiya. unhone 1898 mein tarpedo kiran key pramukh key metameres parr shodh key liye doctorate praapt kii aur 1902 seey keev mein aur phir 1911 seey mosco mein dorpt vishvavidyalaya (tartu) seey prani vigyaan padhaane gaye. unake master kaa thesis nichale kasheruki jeevon key pashchavarti kshetra key vikas parr thaa. nichale kasheruki jeevon key vikas parr apane kaam key liye unhein 1919 kaa carle bayer puraskar milaa. unhone maxillary upkaran aur machhali key shwas angon kii utpatti kaa adhyayan kiya. unhone sujhaav diyaa kii paanch ungaliyon vaalaa tetrapod anga poorvajon key 7-10-ray anga seey vikasit huaa jisamen machhali jaise roopon key bahu-ray pankh shamil they. 1930 mein unhone vikaasvaadi shareer rachana aur aakriti vigyaan key liye ack prayogshala kii sthaapana kii. severtsov ney sent dwara shuru kiye gaye anga kaary parivartan key vishay parr anusaran kiya. george miwart aur anton dorn. 
unake chhatron mein seey ack ivan shamalhausen they. sevartsov ney usa shabd key tahat ernst heckle key javic kaanoon yaa punarkalpan siddhant koo vikasit kiya jise unhone gadhaa, phyloambriologenesis, aur roopaatmak aur vikasatmak parivartanon key madhyam seey vikas kii vyakhya karane kaa prayaas kiya. unhone 1931 mein prakaashit german pustak "morphologishe gasetzmessigkeitten dair evolution" mein isaki vyakhya kii. unakaa betaa sergei alexevich severtsov (1891-1947) ack paaristhitikivid bunn gayaa.

