जैवमण्डल
prithvi ke samast jiv milakar jaivamandal ka nirman karate haian. aisa mana jata hai ki vayumandal ka vikas lagabhag 3.5 arab varsh poorv shuru hua tha.
- vayumandal ko kee bayom mean vibhajit kiya jata hai. pratyek bayom mean ek prakar ke pe d-paudhe v jiv paye jate haian.
- sthal par bayom ka vibhajan akshaansh, samudr star se ooanchaee aur ardrata ke adhar par kiya jata hai.
- arkatik v aantarkatik vrittoan ke jiv mean aur atyant banjar bhoomi par p dane vale bhaumik bayomoan mean pe d-paudhoan v jivoan ki sankhya kafi kam hoti hai.
- vishuvatiy akshaanshoan ki ardr nichali bhoomiyoan mean prajapatiyoan ki vibhinnata sabase zyada paee jati hai.
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tika tippani aur sandarbh
bahari k diyaan
sanbandhit lekh