Question 1. Which classification system is based on evolutionary relationships between various organisms?
- a) Artificial classification system.
- b) Natural classification system.
- c) Phylogenetic classification system.
- d) Sexual classification system.
Answer: c.
Question 2. Cytotaxonomy is based on which of the following cytological informations?
- a) Chromosome number.
- b) Chromosome structure.
- c) Chromosome behaviour.
- d) All of the above.
Answer: d.
Question 3. The natural system of classification for flowering plants was given by which of the following scientists?
- a) Carolus Linnaeus.
- b) George Bentham and Joseph Dalton Hooker.
- c) R.H. Whittaker.
- d) Aristotle.
Answer: b.
Question 4. Which branch of taxonomy uses chemical constituents of the plant to resolve confusions?
- a) Chemotaxonomy.
- b) Cytotaxonomy.
- c) Numerical taxonomy.
- d) Classical taxonomy.
Answer: a.
Question 5. In numerical taxonomy, how are the characters and states evaluated?
- a) By chemical analysis.
- b) By assigning numbers and codes to all observable characters.
- c) By sequencing DNA.
- d) By observing chromosome behaviour.
Answer: b.
Question 6. Algae are largely found in which of the following habitats?
- a) Terrestrial.
- b) Aquatic (both fresh water and marine).
- c) Desert.
- d) Aerial.
Answer: b.
Question 7. The form and size of algae is highly variable. Which of the following is a colonial alga?
- a) Chlamydomonas.
- b) Volvox.
- c) Ulothrix.
- d) Spirogyra.
Answer: b.
Question 8. Which of the following algae forms massive plant bodies in the ocean?
- a) Kelps.
- b) Volvox.
- c) Ulothrix.
- d) Spirogyra.
Answer: a.
Question 9. Vegetative reproduction in algae primarily takes place by which method?
- a) Budding.
- b) Fragmentation.
- c) Fission.
- d) Akinetes.
Answer: b.
Question 10. Asexual reproduction in most algae is by the production of different types of spores. Which is the most common type?
- a) Aplanospores.
- b) Zoospores.
- c) Hypnospores.
- d) Endospores.
Answer: b.
Question 11. Isogamous reproduction, where flagellated gametes are similar in size, is found in which organism?
- a) Spirogyra.
- b) Volvox.
- c) Ulothrix.
- d) Fucus.
Answer: c.
Question 12. Reproduction in Spirogyra is characterized by which of the following?
- a) Isogamous and flagellated gametes.
- b) Isogamous and non-flagellated gametes.
- c) Anisogamous gametes.
- d) Oogamous gametes.
Answer: b.
Question 13. Oogamous reproduction involves the fusion of which type of gametes?
- a) One large, static female gamete and a smaller, motile male gamete.
- b) Two similar, motile gametes.
- c) Two dissimilar, motile gametes.
- d) One small, static female gamete and a larger, motile male gamete.
Answer: a.
Question 14. Which of the following pairs of algae exhibit oogamous reproduction?
- a) Ulothrix and Spirogyra.
- b) Volvox and Fucus.
- c) Chlamydomonas and Eudorina.
- d) Porphyra and Dictyota.
Answer: b.
Question 15. At least what percentage of total carbon dioxide fixation on earth is carried out by algae through photosynthesis?
- a) 10 percent.
- b) 25 percent.
- c) 50 percent.
- d) 75 percent.
Answer: c.
Question 16. Which among the following are marine algae used as food?
- a) Porphyra, Laminaria, and Sargassum.
- b) Chara, Volvox, and Spirogyra.
- c) Ulothrix, Eudorina, and Fucus.
- d) Gelidium, Gracilaria, and Chlorella.
Answer: a.
Question 17. Algin and carrageen are hydrocolloids obtained respectively from which algae?
- a) Brown algae and Red algae.
- b) Red algae and Brown algae.
- c) Green algae and Brown algae.
- d) Red algae and Green algae.
Answer: a.
Question 18. Agar, one of the commercial products used to grow microbes, is obtained from which organisms?
- a) Laminaria and Sargassum.
- b) Gelidium and Gracilaria.
- c) Porphyra and Polysiphonia.
- d) Chlorella and Spirulina.
Answer: b.
Question 19. Which unicellular alga is rich in proteins and used as a food supplement even by space travellers?
- a) Ulothrix.
- b) Chlorella.
- c) Sargassum.
- d) Porphyra.
Answer: b.
Question 20. The members of Chlorophyceae are commonly called green algae. What is the main reason for their grass-green colour?
- a) Dominance of pigments chlorophyll a and b.
- b) Dominance of chlorophyll a and c.
- c) Presence of fucoxanthin.
- d) Presence of phycoerythrin.
Answer: a.
Question 21. In green algae, the chloroplasts may be of various shapes. Which of the following shapes is NOT typically found in green algae chloroplasts?
- a) Discoid.
- b) Plate-like.
- c) Reticulate.
- d) Star-shaped.
Answer: d.
Question 22. Most green algae have one or more storage bodies located in the chloroplasts. What are these bodies called?
- a) Starch grains.
- b) Pyrenoids.
- c) Elaioplasts.
- d) Aleuroplasts.
Answer: b.
Question 23. Pyrenoids, the storage bodies in green algae, contain which components?
- a) Only starch.
- b) Protein besides starch.
- c) Oil droplets only.
- d) Glycogen.
Answer: b.
Question 24. Green algae usually have a rigid cell wall. What are the inner and outer layers of this cell wall composed of?
- a) Inner cellulose, outer pectose.
- b) Inner pectose, outer cellulose.
- c) Inner chitin, outer cellulose.
- d) Inner peptidoglycan, outer algin.
Answer: a.
Question 25. Members of Phaeophyceae or brown algae are primarily found in which habitat?
- a) Fresh water.
- b) Terrestrial environments.
- c) Marine habitats.
- d) Deserts.
Answer: c.
Question 26. Which pigments are primarily responsible for the colour of brown algae?
- a) Chlorophyll a, b, and xanthophylls.
- b) Chlorophyll a, c, carotenoids, and xanthophylls.
- c) Chlorophyll a, d, and phycoerythrin.
- d) Bacteriochlorophylls.
Answer: b.
Question 27. The amount of which specific xanthophyll pigment dictates the varying shades of brown in Phaeophyceae?
- a) Lutein.
- b) Zeaxanthin.
- c) Fucoxanthin.
- d) Violaxanthin.
Answer: c.
Question 28. In brown algae, food is stored as complex carbohydrates, which may be in the form of what?
- a) Starch and glycogen.
- b) Floridean starch.
- c) Laminarin or mannitol.
- d) Paramylon.
Answer: c.
Question 29. The vegetative cells of brown algae have a cellulosic wall covered on the outside by a gelatinous coating of what substance?
- a) Pectin.
- b) Algin.
- c) Agar.
- d) Carrageen.
Answer: b.
Question 30. The plant body of a brown alga is typically attached to the substratum by a holdfast, and has a stalk and a leaf-like photosynthetic organ. What are these stalk and leaf-like organs called respectively?
- a) Stipe and frond.
- b) Seta and capsule.
- c) Rhizoid and thallus.
- d) Petiole and lamina.
Answer: a.
Question 31. The zoospores of brown algae responsible for asexual reproduction possess which specific characteristics?
- a) Pear-shaped with two equal apical flagella.
- b) Pear-shaped with two unequal laterally attached flagella.
- c) Spherical with multiple apical flagella.
- d) Non-motile.
Answer: b.
Question 32. Dictyota, Ectocarpus, Laminaria, Sargassum, and Fucus belong to which class of algae?
- a) Chlorophyceae.
- b) Rhodophyceae.
- c) Phaeophyceae.
- d) Cyanophyceae.
Answer: c.
Question 33. The members of Rhodophyceae are commonly called red algae because of the predominance of which pigment in their body?
- a) Fucoxanthin.
- b) r-phycoerythrin.
- c) Chlorophyll d.
- d) Carotene.
Answer: b.
Question 34. Where do the majority of the red algae occur?
- a) Fresh water lakes.
- b) Marine environments with greater concentrations found in the warmer areas.
- c) Marine environments exclusively in the cold depths.
- d) Terrestrial moist soils.
Answer: b.
Question 35. The food in red algae is stored as floridean starch. This starch is very similar in structure to which of the following?
- a) Amylose and amylopectin.
- b) Glycogen and amylopectin.
- c) Inulin and cellulose.
- d) Laminarin and mannitol.
Answer: b.
Question 36. How do red algae typically reproduce asexually and sexually?
- a) Asexually by motile spores and sexually by motile gametes.
- b) Asexually by non-motile spores and sexually by non-motile gametes.
- c) Asexually by motile spores and sexually by non-motile gametes.
- d) Asexually by non-motile spores and sexually by motile gametes.
Answer: b.
Question 37. Sexual reproduction in Rhodophyceae is strictly of which type?
- a) Isogamous.
- b) Anisogamous.
- c) Oogamous.
- d) Hologamous.
Answer: c.
Question 38. Which of the following is a member of Rhodophyceae?
- a) Polysiphonia.
- b) Sargassum.
- c) Ectocarpus.
- d) Volvox.
Answer: a.
Question 39. Which of the following plant groups are often referred to as the 'amphibians of the plant kingdom'?
- a) Algae.
- b) Bryophytes.
- c) Pteridophytes.
- d) Gymnosperms.
Answer: b.
Question 40. Why are bryophytes called amphibians of the plant kingdom?
- a) Because they can live only in water.
- b) Because they live in soil but are dependent on water for sexual reproduction.
- c) Because they have lungs and gills.
- d) Because they have vascular tissues like aquatic plants.
Answer: b.
Question 41. The main plant body of a bryophyte is haploid. It produces gametes, hence is called a what?
- a) Sporophyte.
- b) Gametophyte.
- c) Prothallus.
- d) Protonema.
Answer: b.
Question 42. In bryophytes, what are the male and female sex organs called respectively?
- a) Antheridium and archegonium.
- b) Archegonium and antheridium.
- c) Microsporangium and megasporangium.
- d) Stamen and carpel.
Answer: a.
Question 43. What is the shape of the archegonium in bryophytes?
- a) Spherical.
- b) Flask-shaped.
- c) Club-shaped.
- d) Ribbon-shaped.
Answer: b.
Question 44. In bryophytes, the zygote does not undergo reduction division immediately. Instead, it produces a multicellular body known as what?
- a) Protonema.
- b) Gametophyte.
- c) Sporophyte.
- d) Gemma.
Answer: c.
Question 45. Is the sporophyte in bryophytes free-living?
- a) Yes, it is fully independent and photosynthetic.
- b) No, it is attached to the photosynthetic gametophyte and derives nourishment from it.
- c) It is free-living initially but later depends on the gametophyte.
- d) It is free-living only in mosses.
Answer: b.
Question 46. Peat, which has long been used as fuel, is provided by species of which bryophyte?
- a) Marchantia.
- b) Polytrichum.
- c) Sphagnum.
- d) Funaria.
Answer: c.
Question 47. Why are mosses along with lichens considered to have great ecological importance?
- a) They are the first organisms to colonise rocks and make the substrate suitable for higher plants.
- b) They fix atmospheric nitrogen efficiently.
- c) They are the primary producers in marine ecosystems.
- d) They prevent soil erosion by producing large amounts of humus.
Answer: a.
Question 48. The plant body of a liverwort is thalloid. Which of the following is a classic example of a liverwort?
- a) Funaria.
- b) Marchantia.
- c) Sphagnum.
- d) Polytrichum.
Answer: b.
Question 49. Asexual reproduction in liverworts takes place by fragmentation of thalli or by the formation of specialised structures called what?
- a) Gemmae.
- b) Sori.
- c) Protonema.
- d) Bulbils.
Answer: a.
Question 50. Gemmae are characterized as which of the following?
- a) Red, multicellular, sexual buds.
- b) Green, multicellular, asexual buds.
- c) Brown, unicellular, asexual spores.
- d) Green, unicellular, sexual spores.
Answer: b.
Question 51. In liverworts, gemmae develop in small receptacles called gemma cups located where?
- a) On the roots.
- b) On the thalli.
- c) On the sporophyte.
- d) On the seta.
Answer: b.
Question 52. The sporophyte in liverworts is differentiated into which parts?
- a) Root, stem, and leaves.
- b) Foot, seta, and capsule.
- c) Holdfast, stipe, and frond.
- d) Rhizome, petiole, and lamina.
Answer: b.
Question 53. Spores are produced within the capsule in bryophytes after which cell division process?
- a) Mitosis.
- b) Meiosis.
- c) Amitosis.
- d) Binary fission.
Answer: b.
Question 54. The predominant stage of the life cycle of a moss is the gametophyte. What is the first stage of the moss gametophyte called?
- a) Prothallus stage.
- b) Protonema stage.
- c) Leafy stage.
- d) Sporophytic stage.
Answer: b.
Question 55. The protonema stage in mosses develops directly from what?
- a) Zygote.
- b) Spore.
- c) Gemma.
- d) Gamete.
Answer: b.
Question 56. The leafy stage of the moss gametophyte develops from what?
- a) The primary protonema as a lateral bud.
- b) The secondary protonema as a lateral bud.
- c) Directly from the spore.
- d) Directly from the zygote.
Answer: b.
Question 57. Which stage in mosses bears the sex organs?
- a) Primary protonema.
- b) Leafy stage.
- c) Sporophyte.
- d) Spore mother cell.
Answer: b.
Question 58. Vegetative reproduction in mosses is by fragmentation and budding in which stage?
- a) Primary protonema.
- b) Secondary protonema.
- c) Leafy stage.
- d) Sporophyte.
Answer: b.
Question 59. Funaria, Polytrichum, and Sphagnum are examples of which group?
- a) Liverworts.
- b) Mosses.
- c) Hornworts.
- d) Ferns.
Answer: b.
Question 60. The Pteridophytes include which of the following plants?
- a) Horsetails and ferns.
- b) Liverworts and mosses.
- c) Cycads and pines.
- d) Monocots and dicots.
Answer: a.
Question 61. Pteridophytes are the first terrestrial plants to possess which of the following?
- a) Flowers and fruits.
- b) Seeds.
- c) Vascular tissues (xylem and phloem).
- d) True roots only.
Answer: c.
Question 62. In pteridophytes, the main plant body is a sporophyte. How is it differentiated?
- a) Into holdfast, stipe, and frond.
- b) Into true root, stem, and leaves.
- c) Into foot, seta, and capsule.
- d) Into primary and secondary protonema.
Answer: b.
Question 63. The leaves in pteridophyta may be small (microphylls) or large (macrophylls). Selaginella and ferns respectively possess which types?
- a) Selaginella has macrophylls, ferns have microphylls.
- b) Selaginella has microphylls, ferns have macrophylls.
- c) Both have microphylls.
- d) Both have macrophylls.
Answer: b.
Question 64. In pteridophytes, sporophytes bear sporangia that are subtended by leaf-like appendages called what?
- a) Sporophylls.
- b) Bracts.
- c) Sori.
- d) Fronds.
Answer: a.
Question 65. In some pteridophytes like Selaginella and Equisetum, sporophylls may form distinct compact structures called what?
- a) Sori or indusia.
- b) Strobili or cones.
- c) Capsules or sporangia.
- d) Nodes and internodes.
Answer: b.
Question 66. The spores in pteridophytes germinate to give rise to inconspicuous, small but multicellular, free-living, mostly photosynthetic thalloid gametophytes called what?
- a) Protonema.
- b) Prothallus.
- c) Suspensor.
- d) Endosperm.
Answer: b.
Question 67. Why is the spread of living pteridophytes limited and restricted to narrow geographical regions?
- a) Because they require extremely high temperatures to survive.
- b) Because their gametophytes require cool, damp, shady places to grow and they need water for fertilization.
- c) Because their seeds are not dispersed efficiently.
- d) Because they lack vascular tissues.
Answer: b.
Question 68. The majority of the pteridophytes are homosporous. What does this mean?
- a) All the spores are of similar kinds.
- b) They produce two kinds of spores, macro and micro.
- c) They do not produce spores.
- d) Their spores are fused together.
Answer: a.
Question 69. Which of the following genera of pteridophytes are heterosporous, meaning they produce two kinds of spores, macro (large) and micro (small) spores?
- a) Dryopteris and Pteris.
- b) Selaginella and Salvinia.
- c) Equisetum and Psilotum.
- d) Adiantum and Lycopodium.
Answer: b.
Question 70. In heterosporous pteridophytes, what do the megaspores and microspores germinate into respectively?
- a) Male and female gametophytes.
- b) Female and male gametophytes.
- c) Sporophytes and gametophytes.
- d) Roots and shoots.
Answer: b.
Question 71. The development of the zygote into young embryos takes place within the female gametophyte in heterosporous pteridophytes. This event is a precursor to which significant evolutionary habit?
- a) Aquatic habit.
- b) Parasitic habit.
- c) Seed habit.
- d) Climbing habit.
Answer: c.
Question 72. Pteridophytes are classified into four classes. Which of the following correctly pairs a class with its example?
- a) Psilopsida - Lycopodium.
- b) Lycopsida - Psilotum.
- c) Sphenopsida - Equisetum.
- d) Pteropsida - Selaginella.
Answer: c.
Question 73. Which of the following ferns is an example of the class Pteropsida?
- a) Dryopteris.
- b) Selaginella.
- c) Lycopodium.
- d) Equisetum.
Answer: a.
Question 74. Gymnosperms are plants in which the ovules are NOT enclosed by any ovary wall. What happens to the ovules post-fertilization?
- a) They become fruits.
- b) They degenerate.
- c) They remain exposed as naked seeds.
- d) They fuse to form a cone.
Answer: c.
Question 75. Sequoia is one of the tallest tree species in the world. To which group does it belong?
- a) Angiosperms.
- b) Pteridophytes.
- c) Bryophytes.
- d) Gymnosperms.
Answer: d.
Question 76. The roots of gymnosperms are generally tap roots. In which genus do roots have fungal associations in the form of mycorrhiza?
- a) Cycas.
- b) Pinus.
- c) Ginkgo.
- d) Sequoia.
Answer: b.
Question 77. In Cycas, small specialized roots called coralloid roots are associated with which organisms?
- a) N2-fixing Cyanobacteria.
- b) Mycorrhizal fungi.
- c) Rhizobium bacteria.
- d) Frankia.
Answer: a.
Question 78. Which of the following features describes the stems of Cycas and Pinus respectively?
- a) Branched in Cycas, unbranched in Pinus.
- b) Unbranched in Cycas, branched in Pinus.
- c) Branched in both.
- d) Unbranched in both.
Answer: b.
Question 79. The leaves in gymnosperms are well-adapted to withstand extremes of temperature, humidity, and wind. In conifers, what adaptation helps reduce water loss?
- a) Broad lamina.
- b) Needle-like leaves.
- c) Presence of extensive spongy mesophyll.
- d) Absence of cuticle.
Answer: b.
Question 80. Gymnosperms are heterosporous. What kinds of spores do they produce?
- a) Haploid microspores and megaspores.
- b) Diploid microspores and megaspores.
- c) Triploid spores.
- d) Only homospores.
Answer: a.
Question 81. In gymnosperms, the microspores develop into a highly reduced male gametophyte. What is this reduced male gametophyte called?
- a) Microsporangium.
- b) Pollen grain.
- c) Antheridium.
- d) Prothallus.
Answer: b.
Question 82. In which gymnosperm are the male and female strobili (cones) borne on the same tree?
- a) Cycas.
- b) Pinus.
- c) Marchantia.
- d) Ginkgo.
Answer: b.
Question 83. The megaspore mother cell in gymnosperms is differentiated from one of the cells of the nucellus. The nucellus is protected by envelopes and the composite structure is called a what?
- a) Ovary.
- b) Ovule.
- c) Megasporangium.
- d) Seed.
Answer: b.
Question 84. The megaspore mother cell divides meiotically to form four megaspores. How many of these usually develop into a multicellular female gametophyte?
- a) One.
- b) Two.
- c) Three.
- d) Four.
Answer: a.
Question 85. Unlike bryophytes and pteridophytes, the male and female gametophytes in gymnosperms lack which characteristic?
- a) They do not produce gametes.
- b) They do not have an independent free-living existence.
- c) They are not haploid.
- d) They lack cellular organization.
Answer: b.
Question 86. In angiosperms, the pollen grains and ovules are developed in specialized structures called what?
- a) Cones.
- b) Strobili.
- c) Flowers.
- d) Sori.
Answer: c.
Question 87. Angiosperms are divided into two classes: the dicotyledons and the monocotyledons. Dicotyledons are typically characterized by having how many cotyledons in their seeds?
- a) One.
- b) Two.
- c) Three.
- d) None.
Answer: b.
Question 88. The male sex organ in a flower is the stamen. What does a typical stamen consist of?
- a) A slender filament with an anther at the tip.
- b) An ovary, style, and stigma.
- c) A petiole and a lamina.
- d) A pedicel and a receptacle.
Answer: a.
Question 89. The female sex organ in a flower is the pistil. What does a pistil consist of?
- a) Filament, anther, and pollen.
- b) Swollen ovary at its base, a long slender style, and a stigma.
- c) Corolla, calyx, and androecium.
- d) Sepals and petals.
Answer: b.
Question 90. Within the ovary of an angiosperm flower, what structures are present?
- a) Microsporangia.
- b) Ovules.
- c) Antherozoids.
- d) Gemmae.
Answer: b.
Question 91. The highly reduced female gametophyte present inside the ovule of an angiosperm is termed as what?
- a) Endosperm.
- b) Embryo sac.
- c) Prothallus.
- d) Nucellus.
Answer: b.
Question 92. Each embryo sac typically has a three-celled egg apparatus. What does this egg apparatus consist of?
- a) One egg cell and two synergids.
- b) Three antipodal cells.
- c) Two polar nuclei and one egg cell.
- d) Three synergids.
Answer: a.
Question 93. In the angiosperm life cycle, one male gamete fuses with the egg cell to form a zygote (syngamy). What does the other male gamete fuse with?
- a) Antipodal cells.
- b) Synergids.
- c) Diploid secondary nucleus.
- d) Central vacuole.
Answer: c.
Question 94. The fusion of the second male gamete with the diploid secondary nucleus produces a triploid structure. What is this structure called?
- a) Primary endosperm nucleus (PEN).
- b) Secondary zygote.
- c) Proembryo.
- d) Suspensor.
Answer: a.
Question 95. Because two fusions (syngamy and triple fusion) occur in an angiosperm embryo sac, this unique event is termed as what?
- a) Double fertilization.
- b) Parthenogenesis.
- c) Apomixis.
- d) Polyembryony.
Answer: a.
Question 96. What is the fate of the synergids and antipodals after fertilization in angiosperms?
- a) They develop into the seed coat.
- b) They degenerate.
- c) They form the fruit wall.
- d) They fuse to form the endosperm.
Answer: b.
Question 97. During the life cycle of any sexually reproducing plant, there is an alternation of generations between gamete producing haploid gametophyte and spore producing diploid sporophyte. In a haplontic life cycle, which is the dominant phase?
- a) The diploid sporophyte.
- b) The free-living gametophyte.
- c) Both are equally dominant.
- d) Neither is dominant.
Answer: b.
Question 98. Which of the following organisms exhibit a haplontic life cycle?
- a) Volvox, Spirogyra, and some species of Chlamydomonas.
- b) Fucus and all seed-bearing plants.
- c) Bryophytes and Pteridophytes.
- d) Pinus and Cycas.
Answer: a.
Question 99. Seed-bearing plants like gymnosperms and angiosperms follow which pattern of life cycle?
- a) Haplontic.
- b) Diplontic.
- c) Haplo-diplontic.
- d) Isomorphic.
Answer: b.
Question 100. Bryophytes and pteridophytes exhibit an intermediate condition where both phases are multicellular. What is this life cycle pattern called?
- a) Haplontic.
- b) Diplontic.
- c) Haplo-diplontic.
- d) Triplontic.
Answer: c.


0 Comments