46.Vitanin C deficient diet produces no deficiency symptoms in

47.The earthworm increases the fertility of soil because it

48.The diploid number of chromosomes in human body is

49.Bleeding from artery is characterised by which of the following ? 1. Blood is red. 2. Blood is purple. 3. Bleeding is continuous. 4. Bleeding is intermittent.

50.Consider the following statements regarding bones in the human body : 1. They consist of 80% solid matter and 20% body 2. Solid matter in the bone is made mainly of cartilage. 3. Impregnation salts including carbonates and phosphates of lime imparts hardness to the bones. 4. In old age, the proportion of lime decreases and bones become brittle and break easily.Of these statements, the correct ones are