Biology
Which one of the following processes takes place in lakes during eutrophication?

Loss of dissolved nutrients from water
Rapid destruction of algal growth
Excessive entry of nutrient into water
Excessive availability of dissolved oxygen

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Biology
Which one of the following statements regarding haemoglobin is correct?

Haemoglobin present in RBC can carry only oxygen but not carbon dioxide
Haemoglobin of RBC can carry only carbon dioxide
Haemoglobin of RBC can carry both oxygen and carbon dioxide
Haemoglobin is only used for blood clotting and not for carrying gases

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