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Test: Plant Kingdom 5 - From Past 28 Years Questions


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Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 1

Sexual reproduction involving fusion of two cells in Chlamydomonas is

[1988]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 1

 Isogamy involves the fusion of gametes which are morphologically and physiologically similar. They are called isogametes. In Chlamydomonas, two vegetative cells may fuse to form a zygospore and the phenomenon is called as hologamy. As a result of fusion of two gametes, zygospore is formed

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 2

Prothallus (gametophyte) gives rise to fern plant (sporophyte) without fertilization. It is [1988]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 2

When prothallus of a fern give rise to sporophyte directly from somatic cell without forming gametes it is Apogamy. Such type of sporophyte is haploid in nature.
Development of gametophyte directly from sporophyte without meiosis and without forming spores, is Apospory.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 3

In gymnosperms like Pinus and Cycas, the endosperm is [1988]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 3

In Gymnosperms like Cycas/Pinus, endosperms of female gametophyte is haploid and formed before fertilizaiton.
In angiosperms endosperm is triploid and develops after fertilization.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 4

Evolutionary important character of Selaginella is

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 4

Presence of two types of spores microspores and megaspores (Heterospory) is the evolutionary characteristic in the life cycle of Selaginella.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 5

Sperms of both Funaria and Pteris were released together near the archegonia of Pteris. Only its sperms enter the archegonia as [1989]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 5

Archegonia of a particular species recognises antherozoids (sperms) of the same species through release of chemical. In Pteris, archegonia produces malic acid which attracts sperms of Pteris only for fertilization.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 6

In Pinus/gymnosperms, the haploid structure are[1989]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 6

Pinus and in all other Gymnosperms endosperm produced before fertilization and is haplolid. Megaspore and pollen grain are initial structures of female gametophyte and male gametophyte respectively hence, they are haploid.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 7

Apophysis in the capsule of Funaria is [1990]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 7

Capsule of the Funaria differentiated into : (1) Operculum – upper part -lid (2) Theca – Middle – fertile part (3) Apophysis – lower -photosynthetic

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 8

Moss peristome takes part in [1990]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 8

 Peristomes are teeth present in the capsule of moss. These are in two rows and helps in the dispersal of the spores due to hygroscopic nature.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 9

Protonema occurs in the life cycle of [1990, 1993]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 9

In Funaria, the spore germinates to form a green multicellular structure called as protonema which later on develops into gametophyte. Presence of protonema is characteristic feature of moss.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 10

The product of conjugation in Spirogyra or fertilization of Chlamydomonas is [1991]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 10

In both the members of green algae, Spirogyra and Chlamydomonas, gametes are fused to form zygote which develops into a thick walled resting zygospore.
Zoospore is asexual spore while Oospore is sexual spore.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 11

The common mode of sexual reproduction in Chlamydomonas is [1991]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 11

In Chlamydomonas, sexual reproduction takes place through : (1)Isogamy : Fusion of 2 similar gametes. (2)Anisogamy : Fusion between morphological similar but physiologically different gametes. (3)Oogamy : Fusion between two dissimilar gametes. (4)Hologamy : Fusion of two young cells. Most common mode is isogamy.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 12

Which one has the largest gametophyte? [1991]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 12

As one moves from thallophyta → Bryophyta → Pteriodophyta → Gymnosperm → Angiosperms, there is reduction in the gametophyte and elaboration of sporophyte.
Hence, in this question moss has largest gametophyte Moss → Selaginella → Cycas → Angiosperm → Reduction in Gametophyte.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 13

Bryophytes are amphibians because [1991]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 13

Bryophytes are amphibians because they complete their vegetative phase on land but water is necessary for their reproductive phase.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 14

A plant in which sporophytic generation is represented by zygote [1992]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 14

The plant body of Chlamydomonas is gametophyte (haploid). It reproduces asexually by zoospore formation and sexually by gametes. Gametes are isogametes which fuses to produce diploid zygote which is the only structure representing sporophytic generation. In Pinus main plant body is sporophyte same is the case with Selaginella and Dryopteris.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 15

 The plant group that produces spores and embryo but lacks vascular tissues and seeds is [1992]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 15

Bryophytes are the plants which produces spores and embryo but no vascular tissues are present, although primitive type of conducting tissues are present in the form of hadrome and leptome.

  • Rhodophytes     &     phaeophytes     are     algae     produces    spores,    no    embryo    &    vascular     tissue
  • Pteridophytes     have     spores,     embryo     and     true vascular tissues.
Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 16

Which one of the following is not common between Funaria and Selaginella? [1992]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 16

Funaria is moss (Bryophyte) possesses archegonium, embryo, flagellated sperms. These are also present in Selaginella (Pteriodophyte) but it also has roots which are absent in Funaria.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 17

A plant having seeds but lacking flowers and fruits belongs to [1992]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 17

Gymnosperms are vascular land plants having naked ovules i.e., ovules are not enclosed in a ovary hence, flower is absent. Ovules after fertilization produces  naked seeds. Pteridophytes (ferns) and mosses do not produce seed.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 18

In Pinus, the pollen grain has 6 chromosomes then in its endosperm will have [1992]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 18

Pollen grains are haploid (n). If haploid no. of chromosomes are 6 then endosperm will also have 6 chromosomes as it is formed before fertilization and is haploid.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 19

Resin and turpentine are obtained from

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 19

Pinus species → Resins and turpentine Cedrus → Timber for railway sleepers Abies → Paper, canada balsam.
Cycas → ornamental plant

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 20

Turpentine is obtained from [1992]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 20

Turpentine is extracted from the wood (xylem) of Pinus (Gymnosperm).
Turpentine is a fluid obtained by the complex distillation of resin obtained from trees, mainly various species of pine (Pinus). It is composed of terpenes, mainly the monoterpenes alpha-pinene and betapinene. Turpentine oil is obtained by boiling resin at 155 degrees Celsius in large tubs. It has a potent odor that is similar to that of nail polish remover.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 21

Pteridophytes differ from mosses/bryophytes in possessing [1993]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 21

Well developed vascular system present in the members of Pteridophytes but absent in mosses as the plant body is sporophyte which is distinguished into true root, stem and leaves. Independent gametophyte, archegonia flagellate spermatozoids are present in moss and pteridophyte both.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 22

In Ulothrix/Spirogyra, reduction division (meiosis) occurs at the time of [1993]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 22

Plant body of Ulothrix and Spirogyra is gametophyte (haploid), they produce zoogametes(n) which fuses to form zygospore (2n) diploid, which is a resting spore. On set of favourable condition zygospore undergoes reductional division or meiosis to produce zoospores which give rise to new plant.

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 23

Chloroplast of Chlamydomonas is [1993]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 23

Shape and number of chloroplast in different member of algae is different Chlamydomonas – cup shaped, 1/cell Zygnema –  Stellate, 2/cell Spirogyra – Spiral, 1/ cell Ulothrix  – Collar shaped, 1/cell

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 24

Pyrenoids are the centres for formation of

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 24

In cell biology, pyrenoids are centers of carbon dioxide fixation within the chloroplasts of algae and hornworts. Pyrenoids are not membrane-bound organelles, but specialized areas of the plastid that contain high levels of ribulose-1,5-bisphosphate carboxylase/ oxygenase (RubisCO). RubisCO fixes carbon dioxide by adding it to the 5-carbon sugar-phosphate, ribulose-1,5-bisphosphate, yielding two molecules of the 3-carbon compound, 3-phosphoglycerate. In a competing reaction, the enzyme uses oxygen to break down ribulose-1,5-bisphosphate to phosphoglycolate and 3-phosphoglycerate, with no net fixation of carbon. 

Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 25

Pinus differs from mango in having [1993]

Detailed Solution for Test: Plant Kingdom 5 - From Past 28 Years Questions - Question 25

Pinus is a gymnospermic plant which has a well developed conducting tissue system but seeds are naked. Whereas mango is an angiospermic plant in which seed are enclosed in the ovary and fruit is present.

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