Fill in the blanks in the following statements using suitable words: (a) A page of a book is a physical example of a …… (b) An inkpot has both…. surfaces (c) Two lines in a plane are either ….or are…..

Fill in the blanks to make the following statements true: Sum of the angles of a triangle is ............ An exterior angle of a triangle is equal to the two ............ opposite angles. An exterior angle of a triangle is always ............ than either of the interior opposite angles. A triangle cannot have more than ............ right angles. A triangles cannot have more than ............ obtuse angles.

Fill in the blanks in the following so that each of the following statements is true. (i) Sides opposite to equal angles of a triangle are ....... (ii) Angle opposite to equal sides of a triangle are ....... (iii) In an equilateral triangle all angles are ....... (iv) In a A B C if /_A=/_C , then A B=\ ..... (v) If altitudes C E\ a n d\ B F of a triangle A B C are equal, then A B= ........ (vi) In an isosceles triangle A B C with A B=A C , if B D\ a n d\ C E are its altitudes, then B D is .......... C E . (vii) In right triangles A B C\ a n d\ D E F , if hypotenuse A B=E F and side A C=D E , then A B C\ ~= ....

Fill in the blanks so as to make the following statements true: (i) If one angle of a linear pair is acute, then its other angle will be .......... (ii) A ray stands on a line, then the sum of the two adjacent angles so formed is .................. (iii) If the sum of two adjacent angles is 180^0 , then the ............ arms of the two angles are opposite rays.

Fill in the blanks in the following statements. (a) Rutherford's alpha -particle scattering experiment lead to the discovery of the …….. . (b) Isotopes have same……… but different……. . (c) Neon and chlorine have atomic numbers 10 and 17 respectively. Their valencies will be...... and........ respectively. (d) The electronic configuration of silicon is .......... and that of sulphur is........ .

Fill in the blanks to make the following statements true: (i) A cuboid has .......... vertices. (ii) A cuboid has .......... edges (iii) A cuboid has .......... faces. (iv) The number of lateral faces of a cuboid is ......... (v) A cuboid all of whose edges are equal is called a ......... (vi) Two adjacent faces of a cuboid meet in a line segment called its ......... (vii) Each edge of a cuboid can be obtained as a line segment in which two ......... meet. (viii) ......... edges of a cube (or cuboid) meet at each of its vertices. (ix) A ......... is a cuboid in which all the six faces are squares. (x) The three concurrent edges of a cuboid meet at a point called the ......... of the cuboid.

Fill in the blanks with suitable words in following statements. (i) Method of producing of plants through tissue culture is called "_______" . (ii) Recovery of healthy plants from diseased plant is possible by using "________" as explant in tissue culture.

Fill in the blanks in each of the following to make the statement true: (i) If two parallel lines are intersected by a transversal, then each pair of corresponding angles are.... (ii) If two parallel lines are intersected by a transversal, then interior angles on the same side of the transversal are...

Fill in the blanks to make the following statements true: In a right triangle the hypotenuse is the ...... side. The sum of three altitudes of a triangle is ......... than its perimeter. The sum of any two sides of a triangle is ......... than the third side. If two angles of a triangle are unequal, then the smaller angle has the ........... side opposite to it. Difference of any two sides of a triangle is ......... than the third side. If two sides of a triangle are unequal, then the larger side has ..... angle opposite to it.

Fill in the blanks with the suitable words Each actin (thin) filament is made of two 'F' (filamentous) actins (a) wound to each other. Each 'F' actin is a polymer of (b) actins. Two filaments of another protein (c) ____also run close to the 'F' actins throughout its length. A complex protein (d) ____ is distributed at regular intervals on the tropomyosin. in the resting state a submit of troponin masks the active binding sites for (e)____ on the (c)____filaments.

Fill in the blanks with suitable words in following statements. (i) Colombia located near the equator has about…….. Species of birds. (ii) More than 1,25,000 species of………. have been reported in Aamzonian rain forest. (iii) Favourable and less seasonal enviroments has helped.............organism to gain more niche specialisation. (iv) Value of slope of regression (Z) of species-area relationship lies in the range of............molluscs in New York state.