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May 21, 2022

Home2022May21

104. According to Hook’s law of elasticity, if stress is increased, the ratio of stress to strain

(a)   Increases                               (b)   Decreases (c)   Becomes zero                      (d)   Remains constant Answer-d (10)

A person sitting in a chair in a satellite feels weightless because

(a)      The earth does not attract the objects in a satellite (b)  The normal force by the chair on the...

Which of the following reproduces vegetatively under favourable conditions

(a)  Algae                                  (b)  Fungi (c)   Bryophyta                         (d)  All the above Ans. d (30)

In Bryophyta the adult plant body is

(a)  Sporophyte                       (b)  Epiphyte (c)   Sporophyll                         (d)  Gametophyte (e)  Antheridium Ans. d (12)

In bryophytes, which part of archegonium encloses egg

(a)  Neck                                   (b)  Cover cell (c)   Venter                                (d)  Neck canal cells Ans. c (13)

A bryophyte which harbours a nitrogen fixing blue-green alga in its thallus is

(a)  Pogonatum                        (b)  Riccia (c)   Marchantia                        (d)  Anthoceros Ans. d (51)

In moss, reduction division takes place in

(a)  Capsule                              (b)  Archegonia (c)   Antheridium                     (d)  At the tip of rhizoids Ans. a (14)

Which is not a part of moss capsule

(a)  Peristome (b)  Protonema (c)   Theca from operculum (d)  Annulus Ans. b (15)

Anchorage organs of Funaria are

(a)  Unicellular rhizoids          (b)  Adventitious roots (c)   Multicellular rhizoids       (d)  True roots Ans. c (13)

A feature common to gametophytes and sporophytes of mosses and ferns is

(a)  Independent existence (b)  Autotrophic nutrition (c)   Unbranched habit (d)  Branched habit Ans. b (12)

22. Two identical rods each of mass M. and length l are joined in crossed position as shown in figure. The moment of inertia of this system about a bisector would be

(a)      Ml2/6 (b)      Ml2/12 (c)     Ml2/3 (d)     Ml2/4 Ans. b (32)

The mode of nutrition of moss sporophyte is

(a)  Autotrophic                       (b)  Parasitic (c)   Saprophytic                       (d)  Semiparasitic Ans. d (45)

Paraphysis in moss are

(a)  One celled and club shaped (b)  Multicelled and club shaped (c)   One celled and bottle shaped (d)  Multicelled and...

Primitive types of stomata are found in the

(a)  Leaves of moss plants (b)  Axis of the moss plant (c)   Apophysis of capsule of moss (d)  All the...

21. Three point masses each of mass are placed at the corners of an equilateral triangle of side a. Then the moment of inertia of this system about an axis passing along one side of the triangle is

  (a)      ma2 (b)      3 ma2 (c)      3/4   ma2 (d)     2/3   ma2 Ans....

A satellite of mass m is placed at a distance r from the centre of earth (mass M). The mechanical energy of the satellite is

(a)  -(GMm/r)                            (b) GMm/r (c)     ...

A satellite moves in a circle around the earth. The radius of this circle is equal to one half of the radius of the moon’s orbit. The satellite completes one revolution in

(a)  1/2      lunar month                        (b)   2/3 lunar month (c) 2-3/2   lunar month             ...

Have capacity of absorbing water, used to replace cotton and used as a fuel is

(a)  Marchantia                        (b)  Riccia (c)   Sphagnum                          (d)  Funaria Ans.  c (9)

Plant body is

(a)  Bryophyta                         (b)  Pteridophyta (c)   Angiosperms                     (d)  Gymnosperm Ans. a (6)

Largest gametophyte is found in ………

(a)  Angiosperm                       (b)  Polytrichum (c)   Nephrolepis                      (d)  Cycas Ans. b   (13)

Function of elaters is

(a)  Absorption of food           (b)  Conduction of sap (c)   Spore dispersal                 (d)  To...

A bryophyte suddenly started reproducing parthenogenetically. The number of chromosomes of the second generation compared to parent plant will be

(a)  Same                                  (b)  One-half (c)   Double                               (d)  Triple Ans. a (6)

 Two satellites A and B go round a planet in circular orbits having radii 4R and R, respectively. If the speed of satellite A is 3v, then speed of satellite B is

(a)  3 v/2                   (b)   4 v/2 (c)    6 v     ...

Spore dispersal by sensor mechanism takes place in

(a)  Funaria                               (b)  Selaginella (c)   Fern                                   (d)  Pinus Ans. a (15)

The dominant phase in the life cycle of Funaria

(a)  Protonema                        (b)  Leafy gametophyte (c)   Spore                                 (d)  Sporophyte Ans. b (6)

Protonema is found in the life cycle of

(a)  Spirogyra                           (b)  Rhizopus (c)   Funaria                               (d)  Escherichia Ans. c (10)

In archegonium of moss (Funaria) plant, the number of neck canal cells is

(a)  2                                         (b)  3 (c)   5                                         (d)  6 to 18 Ans. d (5)

In Funaria the following is not connected with spore dispersal

(a)  Seta                                    (b)  Peristome (c)   Annulus                             (d)  Foot Ans. d (9)

100. Which is correct relation

(a)  Y<σ                                     (b)  Y>σ (c)    Y= σ                      ...

If the earth is at one-fourth of its present distance from the sun, the duration of the year will be

(a)      Half the present year (b)  One-eighth the present year (c)   One-fourth the present year (d)  One-sixth the present year...

In moss, medulla has

(a)  Endodermis                      (b)  Hadrome (c)   Hypodermis                      (d)  Piliferous layer Ans. b (9)

The sporophytic phase in Funaria is well developed and is composed of

(a)  Foot, seta and capsule      (b)  Spore sac (c)   Capsule only                      (d)  Foot and capsule Ans. a (22)

Venus looks brighter than other planets because

(a)      It is heavier than other planets (b)  It has higher density than other planets (c)   It is closer to...

Vegetative reproduction in Funaria takes place by

(a)  Primary protonema          (b)  Gemmae (c)   Secondary protonema      (d)  All the above Ans. d (8)

Apophysis is moss capsule in

(a)  Upper part                        (b)  Middle part (c)   Lower part                        (d)  Fertile part Ans. c   (9)

The peristome of Funaria has

(a)  4 teeth in one ring            (b)  32 teeth in 2 rings (c)   16 teeth in one rings        (d)  16...

A geostationary satellite is revolving around the earth. To make it escape from gravitational field of earth, is velocity must be increased

(a)      100%                                        (b)  41.4% (c)   50%                             ...

Funaria gametophyte is

(a)  Dioecious and autoecious (b)  Monoecious and autoecious (c)   Dioecious and heteroecious (d)  Monoecious and heteroecious Ans. b (8)

26. Four spheres, each of mass and radius are situated at the four corners of square of side . The moment of inertia of the system about an axis perpendicular to the plane of square and passing through its centre will be

(a)    (5/2)M  (4r2 +5R2) (b)    (2/5)M (4r2+5R2) (c)    (2/5)M  (4r2 +5r2) (d)    (5/2)M  (4r2 +5r2) Ans....

Orbit of a planet around a star is

(a)      A circle                                   (b) ...
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