Question Detail Human blood is a viscous fluid due to Platelets in plasmaProteins in bloodRBC and WBC in bloodSodium in serum Answer: Option B Similar Questions : 1. Quinine is extracted from the bark of : NeemCedarEucalyptusCinchona Answer: Option D 2. Plants synthesise protein from ? fatty acidsamino acidsstarchsugar Answer: Option B 3. Rafflesia is the biggest flower of the world ? TRUEFALSE Answer: Option A 4. What is movement of cell against concentration gradient is called osmosisactive transportdiffusionpassive transport Answer: Option B 5. Which blood group is known as Universal donor ? A+A-ABO Answer: Option D Read more from - Biology Questions Answers