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Multiple Choice Questions:Question 1. Put a tick mark (✓) against the correct alternative in the following statements (1) Pollen is produced in the:(a) Filament(b) Style(c) Pistil(d) AntherSolution: (d) Anther (2) Reproductive whorls of a flower are:(a) Stamens and carpels(b) Sepals and petals(c) Sepals and stamens(d) Petals and carpelsSolution: (a) Stamens and carpels (3) Grafting is a method of:(a) […]

Question 1. Multiple Type Question:- Question 1. Which one of the following is one of the characteristics of self-pollinated flowers?a) Flowers are large and showyb) Flowers remain closed and do not openc) Stigma and anthers mature at the same timed) Pollen is produced in very large quantities Question 2. Exine and intine are the parts of:a) Embryo sacb) […]

Exercise 22 A Question 1. The height of a tree is √3 times the length of its shadow. Find the angle of elevation of the sun. Solution: Let us assumed that, the length of the shadow of the tree be xm.Height of the tree = √3 xIf Ɵ is the angle of elevation of the sun, thentanƟ = √3x/xtanƟ = √3We know […]

Exercise 20A Question 1. The height of a circular cylinder is 20 cm and the radius of its base is 7 cm. Find:(i) the volume(ii) the total surface area. Solution:Given that, Height of the cylinder (h) = 20cmRadius of the base of the cylinder (r) = 7cm Question 2. The inner radius of a pipe is 2.1 cm. […]

Question 1. Solution: Question 2. Solution: Question 3. Solution: Question 4. Solution: Question 5. Prove: sin4 A – cos2 A = 2sin2 A – 1 Solution:sin4 A – cos4 A(sin2 A)2-(cos2 A)2(sin2 A + cos2 A) – (sin2 A – cos2 A)1-(sin2 A-cos2 A)sin2 A – cos2 Asin2 A – (1- sin2 A)2sin2 A – 1LHS = RHS […]

Question 1. In the given figure, O is the centre of the circle. ∠OAB and ∠OCB are 30° and 40° respectively. Find ∠AOC. Show your steps of working. Solution: Given:- O is the centre of the circle. ∠OAB and ∠OCB are 30° and 40° respectively.Construction:- Join ACLet us assumed that, ∠OAC = ∠OCA = x∠AOC = 180˚ […]

Multiple Choice Questions:- Question 1. In potato starch is stored in:a) Sclerenchymab) Collenchymac) Parenchymad) Chlorenchyma Question 2. Tendons and ligaments are examples of:a) Fibrous connective tissueb) Cartilagec) Muscular tissued) Adipose tissue Question 3. Which one of the following pairs is correctly matched?a) Meristem – Actively dividing cellsb) Xylem – Transport of foodc) Phloem – Transport […]

Question 1. In the figure, given below, straight lines AB and CD intersect at P; and AC||BD. Prove that:(i) ∆APC and ∆BPD are similar.(ii) If BD = 2.4 cm AC = 3.6 cm, PD = 4.0 cm and PB = 3.2 cm; find the lengths of PA and PC. Solution:(i) In given triangle ∆APC and […]

Question 1. Given— PQ is perpendicular bisector of side AB of the triangle ABC. Prove— Q is equidistant from A and B. Solution: Given that, PQ is perpendicular bisector of side AB of the triangle ABC.Construction: Join AQProof: In ∆AQP and ∆BQP, AP = BP (given)∠QPA = ∠QPB (Each 90˚)PQ = PQ (Common)∆AQP ≅ ∆BQP (SAS […]