2022Flame Institute

Transfusion tissue, a modified vascular tissue is present in the leaves of

(a) Pinus (b) Dryopteris (c) Lycopodium (d) Dalbergia Ans. a (13)

Assertion : We can not move even a finger without disturbing all the stars. Reason : Every body in this universe attracts every other body with a force which is inversely proportional to the square of distance between them.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion. (c) If assertion is …

Coralloid roots of Cycas are useful in

(a) N2-fixation (b) Absorption (c) Transpiration (d) Fixation Ans. a (17)

Fern character in Cycas is

(a) Coralloid roots (b) Tap root system (c) Circinate venation (d) Reticulate venation Ans. c (38)

Assertion : The binding energy of a satellite does not depend upon the mass of the satellite. Reason : Binding energy is the negative value of total energy of satellite.

In which plant largest sperms are found

(a) Cycas (b) Pinus (c) Mango (d) Sunflower Ans. a (9)

Diploxylic or polyxylic vascular bundles are found in

(a) Pinus (b) Dryopteris (c) Cycas (d) Funaria Ans. c (5)

Assertion : Space rockets are usually launched in the equatorial line from west to east. Reason : The acceleration due to gravity is minimum at the equator.

Assertion : A body becomes weightless at the centre of earth. Reason : As the distance from centre of earth decreases, acceleration due to gravity increases.

Assertion : Generally the path of a projectile from the earth is parabolic but it is elliptical for projectiles going to a very large height. Reason : The path of a projectile is independent of the gravitational force of earth.

Assertion : When distance between two bodies is doubled and also mass of each body is also doubled, gravitational force between them remains the same. Reason : According to Newton’s law of gravitation, force is directly proportional to mass of bodies and inversely proportional to square of distance between them.

Assertion : The time period of revolution of a satellite close to surface of earth is smaller than that revolving away from surface of earth. Reason : The square of time period of revolution of a satellite is directly proportional to cube of its orbital radius.

Assertion : Two different planets have same escape velocity. Reason : Value of escape velocity is a universal constant.

Assertion : The principle of superposition is not valid for gravitational force. Reason : Gravitational force is a conservative force

The wing in Pinus seed originates from

(a) Integument (b) Adaxial surface of ovuliferous scale (c) Bract scale (d) Cone axis Ans. b (9)

Seed of Pinus shows three generations as

(a) Parent sporophyte, gametophyte and future sporophyte (b) Parent gametophyte, sporophyte and future gametophyte (c) Parent sporophyte, sporophyte, future gametophyte (d) None of these Ans. a (15)

Assertion : The time period of geostationary satellite is 24 hours. Reason : Geostationary satellite must have the same time period as the time taken by the earth to complete one revolution about its axis.

In Pinus male gametes are produced in the pollen tube by the division of which of the following cells

(a) Body cell (b) Stalk cell (c) Tube cell (d) Prothallial cell Ans. a (4)

Assertion : Earth has an atmosphere but the moon does not. Reason : Moon is very small in comparison to earth.

Pinus is

(a) Deciduous (b) Dioecious (c) Monoecious (d) None of these Ans. c (19)

Assertion : If an earth satellite moves to a lower orbit, there is some dissipation of energy but the satellite speed increases. Reason : The speed of satellite is a constant quantity.

14. Assertion : Orbital velocity of a satellite is greater than its escape velocity. Reason : Orbit of a satellite is within the gravitational field of earth whereas escaping is beyond the gravitational field of earth.

The seed of Pinus sp. is

(a) Uneconomic and nonendospermic (b) Abaxial and rounded (c) Adaxial and endospermic (d) Hypogeal and monocotyledonous Ans. c (12)

Assertion : A planet moves faster, when it is closer to the sun in its orbit and vice versa. Reason : Orbital velocity in orbital of planet is constant.

In Pinus male and female reproductive structures occur

(a) On different branches of the same plant (b) On different plants (c) On same branch (d) None of these Ans. a (11)

The pollination in Pinus is

(a) Entomophilous (b) Anemophilous (c) Hydrophilous (d) Malscophilous Ans. b (12)

Assertion : Even when orbit of a satellite is elliptical, its plane of rotation passes through the centre of earth. Reason : According to law of conservation of angular momentum plane of rotation of satellite always remain same.

In Pinus only lower part of oospore is concerned with the development of embryo, such development is

(a) Meroblastic (b) Periblastic (c) Mesoblastic (d) None of these Ans. a (5)

Assertion : Gravitational potential of earth at every place on it is negative. Reason : Every body on earth is bound by the attraction of earth.

In Pinus female gametophyte develops only from

(a) Upper most haploid megaspore (b) The lower most haploid megaspore (c) Penultimate megaspore (d) The 3rd megaspore Ans. b (8)

Assertion : The ratio of inertial mass to gravitational mass is equal to one. Reason : The inertial mass and gravitational mass of a body are equivalent.

Female cone of Pinus is considered equivalent to

(a) Dwarf shoot (b) Long shoot (c) Needles (d) Scale leaves Ans. b (8)

Assertion : A force act upon the earth revolving in a circular orbit about the sun. Hence work should be done on the earth. Reason : The necessary centripetal force for circular motion of earth comes from the gravitational force between earth and sun.

Siphonogamous fertilization takes place in

(a) Bryophytes (b) Selaginella (c) Fern (d) Pinus Ans. d (7)

The giant tree among the pines belongs to

(a) Cedrus (b) Pinus (c) Dalbergia (d) Sequoia Ans. d (9)

Assertion : There is no effect of rotation of earth on acceleration due to gravity at poles. Reason : Rotation of earth is about polar axis

Plant of pine is

(a) Annual herb (b) Biannual herb (c) Evergreen tree (d) Deciduous tree Ans. c (10)

Assertion : The difference in the value of acceleration due to gravity at pole and equator is proportional to square of angular velocity of earth. Reason : The value of acceleration due to gravity is minimum at the equator and maximum at the pole.

A shell of mass M and radius R has a point mass m placed at a distance r from its centre. The gravitational potential energy U (r) vs r will Answer: c (20)

The spur of Pinus occelsa is

(a) Unifoliar (b) Bifoliar (c) Trifoliar (d) Pentafoliar Ans. d (6)

Year: 2022

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