Materialism, in this sense, refers to the theory that physical matter is the only or fundamental reality, that everything in the universe, including all life, came into existence without any supernatural intervention in the process.
“ उत्परिवर्तनांकरवी [एखाद्या वनस्पतीच्या अथवा प्राण्याच्या] मूळ जातीपासून पूर्णपणे नवी अशी जाती उत्पन्‍न करणे शक्य नाही ”