(a) mgR (b) 1/2 mgR (c) 2 mgR (d) 1/4 mgR Answer: b (251)
(a) Parallel venation (b) Perennial plants (c) Distinct branches (long and short branches) (d) Xylem with vessels Ans. d (9)
(a) Red drop (b) Pollens droped by wind (c) Secretion of nucellus …
(a) Decussate (b) Tetrahedral (c) Linear (d) Isobilateral Ans. c (9)
(a) Big vacuole (b) Lysigenous cavity (c) Intercellular space (d) Schizogenous cavity Ans. d (5)
An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy E0. Its potential energy is (a) – E0 …
A simple pendulum has a time period T1 when on the earth’s surface and T2 when taken to a height R above the earth’s surface, where R is the radius of the earth. The value of T2/T1 is (a) 1 …
(a) Ephedra (b) Selaginella (c) Funaria (d) All gymnosperms Ans. a (8)
(a) Pinus (b) Ginkgo (c) Thuja (d) Deodar Ans. b (7)
(a) Phloem of both have companian cells (b) Endosperm is formed before fertilization in both (c) Origin of ovule and seed is similar in both (d) Both have leaves, stem and roots Ans. d (13)
(a) Cycadophyta (b) Coniferophyta (c) Gnetopsida (d) Both (a) and (b) Ans. d (15)
(a) Sterile plants (b) Angiosperms (c) Primitive (d) Gymnosperms Ans. d (9)
(a) g will increase (b) g will decrease (c) Escape velocity will remain unchanged (d) Potential energy will remain unchanged Answer: Answer: (b,c,d) (9)
(a) Coenozoic (b) Palaeozoic (c) Pre–cambrian (d) Mesozoic Ans.b (7)
(a) Veins (b) Xylem parenchyma (c) Transfusion tissue (d) Medullary rays Ans. c (7)
In order to make the effective acceleration due to gravity equal to zero at the equator, the angular velocity of rotation of the earth about its axis should be (g= 10 ms-2 and radius of earth is 6400 kms) (a) …
(a) Abies balsamea (b) Impatiens balsamia (c) Pinus sp. (d) Helianthus annus Ans. a (5)
An inverted bell lying at the bottom of a lake 47.6 m deep has 50 cm3 of air trapped in it. The bell is brought to the surface of the lake. The volume of the trapped air will be (atmospheric …
2. Two bodies are in equilibrium when suspended in water from the arms of a balance. The mass of one body is 36 g and its density is 9 g / cm3. If the mass of the other is 48 …
(a) Decrease by 2% (b) Remain unchanged (c) Increase by 2% (d) Increase by 1% Answer: c (5)
(a) Cotyledon (b) Endosperm (c) Ovary wall (d) Testa Ans. c (8)
(a) Tap root (b) Adventitious roots (c) Rhizoid (d) Rhizophores Ans. d (13)
Suppose the gravitational force varies inversely as the nth power of distance. Then the time period of a planet in circular orbit of radius R around the sun will be proportional to (a) R(n+1/2) …
(a) Cycas (b) Pinus (c) Zamia (d) Gnetum Ans. c (8)
(a) They are seedless plants (b) They are not pollinated (c) They have no ovary (d) Process of fertilization does not take place in them Ans. c (4)
(a) Animals (b) Wind (c) Water (d) Insects Ans. b (8)
(a) 1/3 (b) 1/2 (c) 1/4 (d) 1/5 Answer: b (6)
(a) The acceleration of S is always directed towards the centre of the earth (b) The angular momentum of S about the centre of the earth changes in direction but its magnitude remains constant (c) The total mechanical energy of …
(a) Only antheridia (b) Both antheridia and archegonia (c) Archegonia but no antheridia (d) Both absent Ans. c (7)
(a) Fungi (b) Bryophytes (c) Pteridophytes (d) Gymnosperms Ans. d (5)
(a) Bulbs (b) Corms (c) Rhizomes (d) Seeds Ans. d (7)
(a) Algae (b) Bryophyta (c) Pteridophyta (d) Gymnosperms Ans. d (9)
(a) Gymnosperms (b) Dicots (c) Monocots (d) All the above Ans. a (8)
(a) Selaginella (b) Fern (c) Pinus (d) Both (a) and (c) Ans. d (23)
(a) Xerophytic (b) Hydrophytic (c) Halophytic (d) Epiphytic Ans. a (6)
(a) Ligule (b) Indusium (c) Stipule (d) Petiole Ans. a (8)
(a) Ramenta (b) Trabeculae (c) Rhizophore (d) Ligule Ans. a (9)