(a) Pinus plant (b) Zygote (c) Micro and megaspores (d) Male and female cones Ans. c (11)
(a) Presence of resin cells (b) Presence of resin ducts (c) Absence of resin ducts (d) Presence of vessels Ans. b (7)
(a) One needle (b) Two needles (c) Three needles (d) All correct Ans. d (8)
(a) No seeds (b) Flowers (c) No vascular tissues (d) Naked seeds in cones Ans. d (7)
(a) It is of much economic value (b) It is cosmopolitan in distribution (c) If grows in deserts and exhibits xerophytic character (d) If form deciduous trees in temperate region Ans. a (14)
(a) Haploid endosperm (b) Bicilliated sperms (c) Double fertilization (d) Presence of antheridia Ans. a (10)
A sphere of mass M and radius R2 has a concentric cavity of radius R1 as shown in figure. The force F exerted by the sphere on a particle of mass m located at a distance r from the centre …
(a) Leaves of Selaginella (b) Scaly leaves of Pinus (c) Needles of Pinus (d) Foliar leaves of Pinus Ans. b (7)
(a) Bract and ovuliferous scales (b) Embryo with two cotyledons (c) Resin canals in needles (d) Tracheids with bordered pits Ans. b (9)
(a) Competition among adjoining trees for sunlight (b) The effect of auxins on growth of stem tips (c) Adaptation for wind pollination (d) Efficiency of water transport from ground to leaves Ans. c (10)
(a) Cycas (b) Pinus (c) Abies (d) Cedrus Ans. b (6)
(a) Above suspensor cells (b) Between suspensor and embryonal cells (c) Between primary and secondary suspensor cells (d) Between embryonal and apical cells Ans. a (7)
(a) Roots (b) Endosperm (c) Dwarf shoot (d) Long shoot Ans. b (7)
(a) 1 prothallial cell (b) 2 prothallial cells (c) 4 prothallial cells (d) A mass of cells Ans. b (5)
(a) Two cotyledons (b) One cotyledon (c) Fleshy cotyledons (d) Many cotyledons Ans. d (8)
A geostationary satellite orbits around the earth in a circular orbit of radius 36000 km. Then, the time period of a satellite orbiting a few hundred kilometres above the earth’s surface (REarth = 6400 km ) will approximately be (a) 1/2 …
(a) Cycas (b) Pinus (c) Papaver species (d) None of the above Ans. b (6)
(a) Tracheids (b) Vessels (c) Equal number of tracheids and vessels (d) More vessels and less tracheids Ans. a (8)
(a) Megaspore, integument, root (b) Endosperm, megaspore, pollen grain (c) Pollen grain, leaf, root (d) Megaspore, endosperm, embryo Ans. b (7)
(a) 64.5 (b) 129 (c) 182.5 (d) 730 Answer: b (23)
(a) Long shoot (b) Needle leaves (c) Dwarf shoot (d) None of the above Ans.c (10)
(a) Armed parenchyma (b) Chlorenchyma (c) Spongy parenchyma (d) Transfusion tissue Ans. c (41)
(a) Bicollateral (b) Collateral and closed (c) Collateral and open (d) Concentric Ans. c (8)
A projectile is projected with velocity kve in vertically upward direction from the ground into the space. (ve is escape velocity and k<1) . If air resistance is considered to be negligible then the maximum height from the centre of …
(a) Pinus sylvestris (b) Pinus monophylla (c) Pinus gerardiana (d) Pinus roxburghii Ans. c (12)
Two bodies of masses m1 and m2 are initially at rest at infinite distance apart. They are then allowed to move towards each other under mutual gravitational attraction. Their relative velocity of approach at a separation distance r between them …
(a) The gravitational force due to this object at the origin is zero (b) The gravitational force at the point B (2, 0, 0) is zero (c) The gravitational potential is the same at all points of the circle y2+ …
(a) Monofoliar (b) Bifoliar (c) Trifoliar (d) Tetrafoliar Ans. b (9)
(a) Funaria (b) Selaginella (c) Fern (d) Pinus Ans. d (10)
(a) One celled stage (b) Two celled stage (c) Three celled stage (d) Four celled stage Ans. d (11)
(a) Ferns (b) Selaginella (c) Pinus (d) All the above Ans. c (14)
(a) Mosses (b) Selaginella (c) Fern (d) Pinus Ans. d (11)
(a) Bryophyta (b) Selaginella (c) Ferns (d) Pinus Ans. d (8)
(a) 16 (b) 8 (c) 4 (d) 24 Ans. c (6)
(a) 4 (b) 3 (c) 2 (d) 1 Ans. c (5)