O‘simlik to‘qimalari massasining 99% ini asosan 7 ta asosiy element tashkil etadi. Berilgan javoblardan ushbu yettilikka kiruvchi ikki elementni toping.

O‘simlik tarkibining ~99% ini C, H, O, N, P, K, Ca, Mg, S tashkil etadi. Javoblar orasidan ikkalasi ham shu ro‘yxatga kiradigan variant – C, H.

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