Q. In carbon cycle, the flow of energy is

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Q. Coal, natural gas and oil are forms of

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Q. During respiration, the carbon dioxide (CO₂) is

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Q. Color of oxyhemoglobin compound is

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Q. Carboxyhemoglobin is formed if

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Q. Formation of carboxyhemoglobin

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Q. Carboxyhemoglobin is of

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Q. Lives of organisms in ecosystem become threatened due to

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Q. Reaction between oxides of nitrogen (N₂) and oxygen (O₂) results in

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Q. Incomplete burning of fuel causes

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Q. Process by which harmful substances are added to environment is called as

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Q. Reaction between sulfur dioxide and oxygen results in

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Q. Acidic waste products can be made less harmful if treated with

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Q. Pollutants from natural cause can

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Q. Harmful substances introduced in the air includes all, but

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Q. Which one is true about fats?

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Q. Due to osmotic pressure in marine fish, kidneys

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Q. Amino acid chain in a protein molecule is

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Q. Elements of carbon (C), hydrogen (H₂) and oxygen (O₂) are present in

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Q. Trace elements do not include

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