Antibiotics commonly block biochemical pathways important for the growth of(A) Virus (B) Bacteria (C) Protozoa (D) All above SECTION B 21. Write any two differences between Distance and Displacement2 22. A car starts from rest and attains a velocity of 20m/s in 5s. Calculate the distance during this time. 2 23. Write the formula of Calcium and Sulphate ions. Also write the formula of the compound between them. (Or) Find the molecular mass of H2O.2 24. When Magnesium ribbon is burnt in air, write any two observations and name the type of the reaction. 2 25. Write two differences between mass and weight. 2 26. Name the different components of xylem and draw a living component?Or Differentiate between voluntary and involuntary muscles. Give one example of each type. 2 SECTION C 27. Name the method used to separate the following mixtures. a) Miscible liquids b) Dye from ink c) Components of air. 3 28. i) Draw the sketch of Bohr model of atom ii) What do you mean by ATOMIC NUMBER. iii) How many electrons can be accommodated in n=3 shell in Bohr model of atom. 3 29. i) Define atomic mass unit. ii) What is the numerical value of mole. iii) Name the elements present in oxide ion. 3 30. State Newton’s second law of motion. Derive F = ma 3 31. Give three features of cardiac muscles. How can distinguished from skeletal muscle. 3​