query: ધૂમકેતુઓ પૃથ્વી પર પાણી તથા પ્રોટીન્સ બનાવી શકે અને જીવન રચનાને આધાર આપી શકે એવા સેન્દ્રીય પદાર્થ લાવવાના સ્ત્રોત રહ્યા હશે.
positive: Comets may possibly have been a source of water delivery to the earth along with organic matter that can form proteins and support life.
negative: Comets may impossibly have been a source of water delivery to the earth along with functional matter that can form proteins and support life. Comets may possibly have been a source of water delivery to the earth along with inorganic matter that can form proteins and support life. Comets may possibly have been no source of water delivery to the earth along with organic matter that can form proteins and support life. Comets will have been a source of water delivery to the earth along with organic matter that will form proteins and support life.