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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1201. |
Which one of the following statements is wrong.A. Algae increase the level of dissovledf oxygen in the immediate environment.B. Algin is obtained from red algae, and carrageenin from brown algae.C. Agar-agar is obtained from Gelidium and GracilariaD. Laminaria and Sargassum are used as food. |
| Answer» Correct Answer - B | |
| 1202. |
In seloninella trabeculae are the modification ofA. Epidermal cellsB. Cortical cellsC. Endodermal cellsD. Pericycle cells |
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Answer» Correct Answer - c The endodermis is interupted by large intercellular space. This is called the trabeculated endodermis (modififed endodermal cell). This layer, due to presence of casparian strips is regarded as endodermis. |
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| 1203. |
Most important alga in research centres isA. MycoplasmaB. SpirogyraC. Chlorella-Unicellular non-flagellatedD. Blue-green algae |
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Answer» Correct Answer - c Chlorella could be used to provide . `O_(2)` during space fight trips. The alga can reuse `CO_(2)` during the process of photosynthesis and release `O_(2)` for the use by Astronoutes. |
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| 1204. |
Trabeculae endodermis is found inA. Axis and capsule of moss plantB. Stem of SelaginellaC. Sterm of CycasD. Stern of Pinus |
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Answer» Correct Answer - b Trabeculae endo dermis: Endodermis having air chambers. The endodermis except in xerophytic species (S. lepidophylla and S. rupestris) is interrupted by large intercellular spaces. This is called the trabeculated endodermis. |
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| 1205. |
In fer, sporangia are borne on theA. Margin of leafB. Abaxidal side of leafC. Adaxial side of leafD. Only on the tip of leaf |
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Answer» Correct Answer - a Sporangia develop in groups called sori, Sori develop on the under surface of leaves and leaflets, laterally or marginally. |
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| 1206. |
The shapeof sporangium in ferm isA. BiconvexB. CircularC. BiconcaveD. Plano-convex |
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Answer» Correct Answer - a Each sporangium has a multicellular stalk and a biconvex capsule. |
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| 1207. |
Zygotic meiosis is characteristic ofA. MarchantiaB. FucusC. FunariaD. Chlamydomonas |
| Answer» Correct Answer - D | |
| 1208. |
Zygotic meiosis is characteristic ofA. FucusB. FunariaC. ChlamydomonasD. Marchantia |
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Answer» Correct Answer - C Zygotic meiosis is characteristic of Chlamydomonas. |
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| 1209. |
Which of the following is not correct with reference to SeloginellaA. Selaginella is commonly distributed on hills and plainsB. Some species of Selaginella are truly xerophyticC. The vascular cylinder is protostelicD. The endodermis is trabeculated |
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Answer» Correct Answer - a Selaginella is mainly found in damp shaded places. A few species are xerophytic (e.g., S. lepidophylla. S pilifera, S. bryopteris). |
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| 1210. |
Which statement is correct with reference to PinusA. It is of much economic valueB. It is cosmospolitan in distributionC. If grows in deserts and exhibits xerophytic characterD. If form decidous trees in temperatre region |
| Answer» Correct Answer - a | |
| 1211. |
The gland algae or sea weeds belong to class.A. PhaeophyceaeB. RhodophyceaeC. ChlorophyceaeD. Xanthophyceae |
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Answer» Correct Answer - a The larger (giant) parenchymatous forms of brown algae called kelps or sea weed or trees of seas or forest of sea. Sea weed may be marine. |
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| 1212. |
Sea weeds belongs toA. Green algaeB. Red algaeC. Brown algaeD. BGA |
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Answer» Correct Answer - C Sea weeds belongs to brown algae. |
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| 1213. |
Consider the following four statements whether they are correct or worng.A. The sporophyte in liverworts is more elaborate than that in mosses.B. Salvinia is heterosporousC. The life-cycle in all seed-bearing plants is diplonticD. In Pinus male and female cones are borne of different trees |
| Answer» Correct Answer - d | |
| 1214. |
Zygotic meiosis is characteristic ofA. MarchantiaB. FucusC. FunnariaD. Chlamydomonas |
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Answer» Correct Answer - d In algae reserve food material in mainly starch. |
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| 1215. |
Agranal chloroplast are found inA. BryophytesB. GrmnospermsC. Green algaeD. Angiosperms |
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Answer» Correct Answer - c Grana is absent in green algae. |
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| 1216. |
Sea weeds are important source ofA. ChlorineB. FluorineC. IodineD. Bromine |
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Answer» Correct Answer - c A large amount of iodine is extracted from kelps (brown sea weeds) like Laminaria, Ecklonia etc.) |
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| 1217. |
Pinus belongs to the classA. gnetopsidaB. cycadopsidaC. coniferopsidaD. sphenopsida |
| Answer» Correct Answer - C | |
| 1218. |
In oogamy. Fertilization involvesA. A large non-motile female gamete and a small non-motile male gameteB. A large motile female gamete and a small non-motle male gemeteC. A small non-motle female gaemete and a large motile male gamete.D. A large non-motile female gamete and a small motile male gamete |
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Answer» Correct Answer - d Oogamy is most advanced type of reproduction in which male gamete is motile smaller and non food storing called antherozoid while female gamete is food storing, nonmotile larger called oogonium. |
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| 1219. |
Gulf weed belongs to the classA. ChlorophyceaeB. DirlophyceaeC. PhaeophyceaeD. Phaeophyceae |
| Answer» Correct Answer - C | |
| 1220. |
Gulf weed belongs to the classA. ChlorophyceaeB. XanthophyceaeC. PhaeophyceaeD. Rhodophyceae |
| Answer» Correct Answer - C | |
| 1221. |
The hydroxyproline nature of cell wall is found inA. ChlamydomonasB. UlothrixC. SpirogyraD. Chlorella |
| Answer» Correct Answer - A | |
| 1222. |
Fusion of two gametes which are dissinilar in size is tarmed asA. oogamyB. isogamyC. anisogamyD. both a and c |
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Answer» Correct Answer - D In anisogamy the fusing gameters differ in size and behavious. One of the two gametes is larger and is called macrogamete or female gamete, the other is smaller and is termed microgamete or male gamete. In oogamy, there is a large food laden nonflagellate female gamete called egg or oosphere whereas the male gamete or antherozoid is smaller and motile. oogamy is the familiar form of sexual reproduction, it is a form of anisogamy (heterogamy). |
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| 1223. |
The thallus organization of Volvox isA. Multicellular and coccoidB. Colonial and non-flagellateC. UnicellularD. Colonial and motile |
| Answer» Correct Answer - D | |
| 1224. |
Cells of Ulothrix areA. RoundB. SphericalC. CylindricalD. Rectangular |
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Answer» Correct Answer - c Ulothrix is unbranched filament, consisting of numerous cylindrical cells joind end to end. |
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| 1225. |
The thallus of volvox is calledA. TrichomeB. CoenobiumC. CoenocyteD. Parenchymatous |
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Answer» Correct Answer - b Volvox hollow ball like colony with a fixed number of cells is called coenobium. |
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| 1226. |
In Ulothrix, meiosis taken place duringA. Gamete formationB. Zoospore formationC. Zoospore germinationD. Zygote germination |
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Answer» Correct Answer - D In Ulothrix, meiosis takes place during zygote germination |
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| 1227. |
Which type of sexual reproduction is found in volvox?A. isogamousB. anisogamousC. oogamousD. all of these. |
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Answer» Correct Answer - C Volvox shows advanced oogamy which takes place by the formation of antheridia and oogonia. They may be fomred on the same plant (monoecious) or on different plants (dioecious) the sex-organs are produced fewer in number. |
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| 1228. |
Spirogyra differs from Mucor in havingA. Uninucleate gametangiaB. Multicellular gametesC. AnisogameteD. Sexual reproduction |
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Answer» Correct Answer - a Mucor have multinucleate gametangia. |
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| 1229. |
Meiosis in Ulothrix takes place duringA. Zoospore formationB. Gamete formationC. Zygot germinationD. Zoospore germination |
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Answer» Correct Answer - c Favourable conditions each zygote geminates to produce 4-16 meiospores (zoospores or aplanopores). The first division of diploid zygotic nucleus is meiosis. The meio-zoospores or meioaplanopores geminate to produce new filaments. |
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| 1230. |
At least a half of the total `CO_(2)` fixation on earth is carried out thorugh photosysnthesis byA. angiospermsB. gymnospermsC. algaeD. bryophytes. |
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Answer» Correct Answer - C Nearly 50% of total carbon dioxide fixation is carried out by algae through photosynthesis. Photosynthesis by algae releases oxygen in the immediate aquatic environment. It is essential for respiration of aquatic life. |
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| 1231. |
At least a half of the total `CO_(2)` fixation on earth is carried out byA. Green algaeB. Brown algaeC. Red algaeD. Algae |
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Answer» Correct Answer - D At least a half of the total `CO_(2)` fixation on earth is carried out by Algae. |
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| 1232. |
Which group of plants is responsible for maximum fixation of carbon dioxide on earth. Explain how they increase the level of dissolved oxygen in their immediate environment. |
| Answer» Algae fix at least half of the total carbon dioxide fixation on earth by the process of photosynthesis. They are mostly aquatic and occur in fresh water as well as marine habitats. They release oxygen into the environment and consume carbon dioxide in the process of photosynthesis. Thus, they increase the level of dissolved oxygen in the water bodies. | |
| 1233. |
(a) Why is sphagnum used as packing material for trans-shipment of living material ? (b) Why are root-like structures of bryophytes called rhizoids ? |
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Answer» (a) Sphagnum plant has capacity to retain ample amount of water for longer duration. That is why, they are used as packing materials so that the living materials continue to get water during the shipment. (b) The rhizoids arise from gametophytic plant body whereas roots arise from sporophytic plant body. |
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| 1234. |
Which of the following Pteridophytes belong to class PteropsidaA. Equisetum and PsilotumB. Lycopodium and AdiantumC. Seloginella and PterisD. Pteris and Adiantium |
| Answer» Correct Answer - d | |
| 1235. |
Find the correct statement for the prothallus of fern.A. Monoecious, protandrous with multicellular rhizoidesB. Monoecious, protandrous with unicellular rhizoidesC. Dioecious, with unicellular rhizoidesD. Monoecious, protandrous with apical antheredia, and basal archegonia on ventral surface |
| Answer» Correct Answer - B | |
| 1236. |
Pteridophytes are divided into how many classes?A. TwoB. ThreeC. FourD. Six |
| Answer» Correct Answer - C | |
| 1237. |
The type of life-cycle in which there is no free-living sporophyte and the dominant, photosynthetic phase in such plants is the free-living gametophyte. We are talking aboutA. Haplontic life cyclic shown in Volvox and some species of ChlamydomonasB. Diplontic life cycle as shown in seed-bearing plantsC. Halpo-diplontic life cycle as shown in bryophytes and pteridophytesD. Haplo-diplontic life cycle as shown in Kelps |
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Answer» Correct Answer - A The type of life-cycle in which there is no free-living sporophytes and the domonant, photosynthetic phase in such plants is the free-living gametophyte. This haplontic life cycle shown in Volvox some species of Chakmydomonas and Spirogyra. |
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| 1238. |
Rootless pteridophytes with rhizoides are included intoA. SphenopsidaB. PsilopsidaC. PteropsidaD. Lycopsida |
| Answer» Correct Answer - B | |
| 1239. |
The dominant photosynthetic phase in the life cycle of pteridophyta is equivalent to theA. Gametophytic phase of bryophytaB. Sporophytic phase of bryophytaC. Gametophytic phase of pteridophytaD. Gametophytic phase of gymnosperm |
| Answer» Correct Answer - A | |
| 1240. |
Dryopteris is/hasA. Gametophyte as main plant bodyB. HomosporousC. Non-motile male gametesD. Shows seed habit |
| Answer» Correct Answer - B | |
| 1241. |
In DryopterisA. Sporophyte is parasitic over gametophyteB. Sporophyte is independentC. Gametophyte is independentD. Both b and c |
| Answer» Correct Answer - d | |
| 1242. |
Placenta in Dryopteris is the place ofA. OvulesB. RamentaC. SporangiaD. Archegonia |
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Answer» Correct Answer - c In Dryopteris, true indusium is present because this arises from placenta (placental tissue) from which sporangia arise. |
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| 1243. |
Assertion: In chlorophyceae, plant body is usually grass green. Reason: Members of chlorophyceae, possess chlorophyll a, c, carotenoids and xanthophyll.A. If both assertion and reason are true and reason is the correct explanation of assertion.B. if both assertion and reason are true but reason is not the correct explanation of assertionC. if assertion is true but reason is false.D. if both assertion and reason are false. |
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Answer» Correct Answer - C Members of Chloropyceae are commonly called green algae. The plant body is usually grass green due to the dominance of pigments, chlorophyll a and b. |
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| 1244. |
A plant shows thallus level of organization. It shows rhizoids and is haploid. It needs water to complte its life cycle because the male gametes are motile. Identify the group to which it belongs toA. PteridophylesB. GymnospermsC. MonocotsD. Brtyophytes |
| Answer» Correct Answer - d | |
| 1245. |
Heterotrichous nature of thallus is found inA. FunariaB. Fritschiella and EctocmpousC. Stigeoclonium and ColeochaeteD. All of these |
| Answer» Correct Answer - D | |
| 1246. |
Algae were grouped into how many kingdoms according to Whittaker?A. TwoB. ThreeC. OneD. Four |
| Answer» Correct Answer - B | |
| 1247. |
Select the wrong statementA. Anisogametes differ either in structure, function or behaviourB. In oomycetes, female gamete is smaller and motile, while male gametes is larger and non-motileC. Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamyD. Isogametes are simidar in structure, function and behaviour |
| Answer» Correct Answer - B | |
| 1248. |
Isogamous condition whit non-flagellated gametes is found in :A. SpirogyraB. VolvoxC. FucusD. Chlamydomonas |
| Answer» Correct Answer - A | |
| 1249. |
Elater mechanism of spore dispersal is found inA. LiverwortsB. MossesC. FernsD. Cycads |
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Answer» Correct Answer - A Elater mechanism of spore dispersal is found in liverworts (like Marchantia) |
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| 1250. |
Gametophyte do not have free independent existence inA. DryopterisB. CedrusC. FunariaD. Polytrichum |
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Answer» Correct Answer - B Gametophytes do not have free independent existence in Cedrus (as it is a gymnosperm) |
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