Octopus’ blood is blue because it makes use of hemocyanin to transport oxygen, which happens to be a copper-dependent protein that provides the blood a blue colour when it truly is oxygenated. यह भी पढ़ें : जनरल अवेयरनेस क्वेश्चंस जो आपकी परीक्षा की तैयारी में मददगार साबित होंगे इंडियन आर्मी https://www.marketingdigitalmarketing.com/2024/12/general-knowledge-general-studies-questions-with-answers-gk-gs.html