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jyoti

HomeAuthor: jyotiPage 22

The wing in Pinus seed originates from

(a)  Integument (b)  Adaxial surface of ovuliferous scale (c)   Bract scale (d)  Cone axis Ans. b (13)

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...

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 (6)

Pinus is

(a)  Deciduous                         (b)  Dioecious (c)   Monoecious                       (d)  None of these Ans. c (21)

The seed of Pinus sp. is

(a)  Uneconomic and nonendospermic (b)  Abaxial and rounded (c)   Adaxial and endospermic (d)  Hypogeal and monocotyledonous Ans. c (14)

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...

The pollination in Pinus is

(a)  Entomophilous                 (b)  Anemophilous (c)   Hydrophilous                    (d)  Malscophilous Ans. b (15)

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 (7)

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...

Female cone of Pinus is considered equivalent to

(a)  Dwarf shoot                       (b)  Long shoot (c)   Needles                              (d)  Scale leaves Ans. b (10)

Siphonogamous fertilization takes place in

(a)  Bryophytes                        (b)  Selaginella (c)   Fern                                   (d)  Pinus Ans. d (9)

The giant tree among the pines belongs to

(a)  Cedrus                                (b)  Pinus (c)   Dalbergia                           (d)  Sequoia Ans. d (11)

Plant of pine is

(a)  Annual herb                      (b)  Biannual herb (c)   Evergreen tree                  (d)  Deciduous tree Ans. c (12)

The spur of Pinus occelsa is

(a)  Unifoliar                            (b)  Bifoliar (c)   Trifoliar                             (d)  Pentafoliar Ans. d (7)

The seed of Pinus represents

(a)  One generation                 (b)  Two generations (c)   Three generations            (d)  Four generations Ans. c (8)

A microsporophyll in Pinus has

(a)  One microsporangium on the adaxial side (b)  One microsporangium on the abaxial side (c)   Two microsporangia on the abaxial...

Winged pollen grain is the characteristic feature of

(a)  Cycas                                  (b)  Ephedra (c)   Gnetum                              (d)  Pinus Ans. d (9)

The wood of pinus is

(a)  Pycnoxylic and monoxylic (b)  Pycnoxylic and heteroxylous (c)   Manoxylic and homoxylous (d)     Manoxylic and heteroxylous Ans. a (15)

Time lapse between fertilization and seed formation in Pinus is

(a)  6 years                               (b)  2 years (c)   1 ½ years                          (d)  1 year Ans. d (12)

The microsporophylls of Pinus has

(a)  Many microsporangia (b)  No microsporangia (c)   2 microsporangia (d)  Only one microsporangium Ans. c (12)

Annual rings are well seen in

(a)  Selaginella stem                (b)  Cycas wood (c)   Pinus wood                        (d)  All the above Ans. c (12)

Which of the following tissue is present in the leaves of Pinus and serve to conduct water and food

(a)  Xylem                                 (b)  Phloem (c)   Transfusion tissue            (d)  Conducting tissue Ans. c   (14)

The winged pollen grain of Pinus sp. are produced in

(a)  Pollen chamber                (b)  Anther (c)   Tapetum                            (d)  Microsporangium Ans. d (12)

The part of the ovule in the Pinus which has megaspore mother cells dividing to form haploid megaspores is

(a)  Nucellus                             (b)  Embryo (c)   Gametangia                       (d)  Gametophore Ans. a (9)

Pinus shows

(a)  Heterospory                      (b)  Polyembryony (c)   Homospory                        (d)  One type of branching Ans. b (6)

Microsporophyll of Pinus is equivalent to

(a)  Pollen grain of angiosperms (b)  Stamen (c)   Male gametophyte (d)  Inflorescence Ans. d (21)

Female cone of Pinus can be compared to which part of the plant

(a)  Flower                                (b)  Megasporophyll (c)   Inflorescence                    (d)  Microsporophyll Ans. c (10)

Pinus seed shows

(a)  Hypogeal germination (b)  Epigeal germination (c)   Dormancy (d)  None of the above Ans. b (6)

Pinus shows

(a)  Simple polyembryony (b)  Cleavage polyembryony (c)   Both simple and cleavage polyembryony (d)  None of the above Ans. c (14)

Endosperm of Pinus is

(a)  Male gametophyte            (b)  Female gametophyte (c)   Sporophyte                       (d)  None of the above Ans. b (8)

In Pinus megaspore on germination forms

(a)  Pollen tube with two motile sperms (b)  Endosperm with archegonia (c)   Endosperm with sperms (d)  Endosperm with embryo sac...

Ovules in Pinus are generally

(a)  Anatropous with four integuments (b)  Anatropous with one integument (c)   Amphitropous with three integuments (d)  Orthotropous with two integuments...

Integument in Pinus ovule is

(a)  Haploid                              (b)  Diploid (c)   Triploid                              (d)  Tetraploid Ans. b   (8)

The wood obtained from Pinus plant is used for

(a)  Furniture                           (b)  Building purposes (c)   Match boxes                      (d)  All the above Ans. d (12)

Female gametophyte (endosperm) in Pinus is formed

(a)  Before pollination             (b)  After pollination (c)   After fertilization              (d)  None of the above Ans. a (50)

What nature does, acicular nature of Pinus needle depicts

(a)  Mesophytic                        (b)  Xerophytic (c)   Hydrophytic                      (d)  Sporophytic Ans. b (9)

The foliage leaves or needles in Pinus are borne by

(a)  Branches of unlimited growth (b)  Branches of limited growth (c)   Branches of limited and unlimited growth (d)  Female cones...

The megasporophyll of Pinus consists of

(a)  Both bract and ovuliferous scales (b)  Only bract scales (c)   Only ovuliferous scales (d)  None of the above Ans....

Male gametophyte of Pinus is found to be

(a)  10 celled                            (b)  6 celled (c)   4 celled                              (d)  2 celled Ans. c (6)

The edible part of seed of Pinus is

(a)  Epispore                            (b)  Endosperm (c)   Perisperm                         (d)  Pericarp Ans. b (17)
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