May, 2022Flame Institute

Assertion : A person sitting in an artificial satellite revolving around the earth feels weightless. Reason : There is no gravitational force on the satellite.

(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 …

Assertion : For a satellite revolving very near to earth’s surface the time period of revolution is given by 1 hour 24 minutes. Reason : The period of revolution of a satellite depends only upon its height above the earth’s surface.

The stem of female Cycas plant is a

(a) Monopodium (b) Sympodium (c) Rhizomatous (d) Dichotomous Ans. a (11)

Assertion : If earth were a hollow sphere, gravitational field intensity at any point inside the earth would be zero. Reason : Net force on a body inside the sphere is zero.

Cycas circinalis is a source of

(a) Resin (b) Timber (c) Essential oil (d) Starch (Sago) Ans. d (7)

Vascular bundles of Cycas stem are

(a) Conjoint (b) Collateral and closed (c) Conjoint, collateral and open (d) Conjoint, collateral and closed Ans. c (6)

Leaves in Cycas show

(a) Hydrophobic characters (b) Xerophytic characters (c) Mesophytic characters (d) Lithophytic characters Ans. b (11)

51. Number of ovules present on megasporophyll of Cycas is

(a) Only one (b) One pair (c) 1 – 6 pairs (d) Absent Ans. c (15)

In Cycas

(a) Male strobilus and megasporophylls occurs on the same individual (b) The same cone consists of both micro and megasporophylls (c) The same sporophyll bears microsporangia and ovules (d) Male strobilus (cone) and megasporophylls occur on separate individuals Ans. d …

Secondary wood of Cycas is devoid of

(a) Tracheids (b) Vessels (c) Protoxylem (d) Metaxylem Ans. b (10)

Male and female Cycas plants show which type of growth

(a) Monopodial in both (b) Sympodial in both (c) Monopodial in male and sympodial in female plant (d) Sympodial in male and monopodial in female plant Ans. d (37)

Which species of Cycas is having largest male cones

(a) Cycas revoluta (b) C. rumphii (c) C. circinalis (d) C. beddomei Ans. c (11)

The secondary growth in stem of Cycas is brought about by

(a) Persistant cambium (b) Short lived cambium (c) Number of cambia produced in succession (d) Isolated strips of cambium Ans. c (10)

Ptyxis in Cycas is

(a) Simple (b) Circular (c) Circinate (d) None of these Ans. c (6)

Assertion : If earth suddenly stops rotating about its axis, then the value of acceleration due to gravity will become same at all the places. Reason : The value of acceleration due to gravity is independent of rotation of earth.

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.

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)