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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.
| 1151. |
In phaeophyceae, the spores (zoospores) areA. Pyriform and ber 2 flagella (one longitudinal and other transverse)B. Pear-shaped and bear 2 flagella that are laterally attachedC. Pyriform and bear 2-8, equal and apical flagellaD. Pear-shaped and bear 2-8, equal and apical flagella |
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Answer» Correct Answer - B In phaephyceae the spores (zoospores) are pear-shaped and bear two flagella that are laterally attached. |
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| 1152. |
Zoospores are absent inA. VaucheriaB. SpirogyraC. CladophoraD. Chlamydomonas |
| Answer» Correct Answer - b | |
| 1153. |
The zoospores of Ulothrix areA. QuadriflagellatedB. BiflagellatedC. MonoflagellatedD. Alagellated |
| Answer» Correct Answer - A | |
| 1154. |
The zoospores of Ulothrix areA. QuadriflagellatedB. BiflagellatedC. MonoflagellatedD. flagellated |
| Answer» Correct Answer - A | |
| 1155. |
In which group the gametophytic phase is dominant, photosynthetic, independent and sexually reproducing ?A. AngiospermB. GymnospermC. BryophytaD. Pteridophyta |
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Answer» Correct Answer - C In bryophyta, the gametophyte phase is dominant, photosynthetic, independent and sexually reproducing. |
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| 1156. |
Name the botanical name of "peat moss". |
| Answer» Correct Answer - Sphagnum. | |
| 1157. |
Botanical name of peat moss if Or Which of the following is responsible for peat formationA. SphagnumB. MarchantiaC. RicciaD. Funaria |
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Answer» Correct Answer - A Sphagnum is responsible for peat formation. |
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| 1158. |
Zoospores are absent inA. VaucheriaB. SpirogyraC. CladophoraD. Chlmydomonas |
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Answer» Correct Answer - B Zoospores are absent in Spirogyra. |
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| 1159. |
Vascular plants lacking vessels and companion cells areA. AngiospermB. ThallophyteC. BryophytesD. Gymnosperms |
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Answer» Correct Answer - D Vascular plants lacking vessels and companion cells are gymnosperms and pteridophytes. |
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| 1160. |
Common example of red algae isA. porphyraB. BatrachosperumC. ectocarpusD. both a and b |
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Answer» Correct Answer - D Porphyra and Batrachospermum, both are red algae (Rhodophyceae). Ectocarpus is a filamentous marine brown alga (Phaeophyceae). |
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| 1161. |
Botanical name of peat moss if Or Which of the following is responsible for peat formationA. SphagnumB. FunariaC. AnthocerosD. Polytrichum |
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Answer» Correct Answer - a Species of sphagnum, a moss provides peat that have long been used as fuel. |
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| 1162. |
Selection the incorrect statement regarding reproduction in rhodophyceae.A. Asexual reproduction occurs by non-motile spores.B. Sexual reproduction occurs by motile gamets.C. Sexual reproduction is oogamous.D. Complex post-fertilisation developmetal events occurs. |
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Answer» Correct Answer - B Sexual reproduction in Rhodophyceae is oogamous sexual reproduction takes place by non-motile gametes. |
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| 1163. |
Which is a character of Rhodophyceae ?A. Major pigments are chlorophyll a and bB. Commonly called brown algaeC. Stored food is mannitol and laminarinD. Flagella are absent |
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Answer» Correct Answer - D Major pigments are cha a and d Comonly called red algae Stored food in floridean starch Falgella are absent Cell wall contains cellulose, pectin and polysulphate esters. |
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| 1164. |
Which of the following is a character of rhodophyceaeA. Major pigments are chlorophyll a and chlorophyll-bB. Commonly called brown algaeC. Stored food materials are mannitol and laminarinD. Flagellum is absent |
| Answer» Correct Answer - d | |
| 1165. |
Choose the correct order of colours with respect to pigments, chlorophyll,phycoerythrin and fucoxanthinA. Gree, red and brownB. Brown, green and redC. Red,green and brownD. Green,brown and red |
| Answer» Correct Answer - a | |
| 1166. |
Assertion: Only red algae are able to flourish at the great dpth of sea. Reason: Red algae has the pigments r-phycoerythrin and r-phycocyanin.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false |
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Answer» Correct Answer - a The red algae flourish and occur in abundance at great depths of sea where other plants do not occur in abundance. The sunlight as it penetrates water. Portions of spectrum such as red. Orange, yellow and green light rays which are of short wavelenghts are filtered out. Only the blue and violet rays of great wavelenght and the green plants are thus unable to carry the red pigment r-phycoreythrin. On the other hand the pigment `gamma-`phycocyanin which are characteristic pigments of all the red algae, can utilize wavelenghts of light (blue and violet rays) not absorbed b chlorophyll. |
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| 1167. |
In gymnosperms, number of male gamete(s) produced by each pollen grain is/areA. 1B. 2C. 3D. 4 |
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Answer» Correct Answer - B In gymnospermsm number of male gametes produced by each pollen grain are 2 |
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| 1168. |
In gymnosperms, the pollen tube discharge the male gametesA. In the ovaryB. In the microsporangiaC. Near the mouth of the archegoniaD. Both (2) & (3) |
| Answer» Correct Answer - C | |
| 1169. |
In gymnosperms how many male gametes are produced by each pollen grainA. 4B. 3C. 2D. 1 |
| Answer» Correct Answer - C | |
| 1170. |
One of the following differentiates pteridophytes from mosses.A. ProthallusB. Homosporous sporesC. Haplontic life cycleD. All above |
| Answer» Correct Answer - A | |
| 1171. |
Pick up the wrongly matched pairA. Equisetum-Horse tailB. Psilotum-Whisk fernC. Selaginella-Peat mossD. Dryopteris-Male shield fern |
| Answer» Correct Answer - C | |
| 1172. |
Equisetum, commonly called horsetail or scouring rush and exceptional pteridophyte, i.e., xylem with vessels, possesses the character ofA. HeterosporousB. Autotrophic gametophyteC. Biflagellate spermatozoidD. Unjointed stem |
| Answer» Correct Answer - B | |
| 1173. |
Assign the following organisms to their respective plant groups : Cycas, Selaginella, Polysiphonia, Sequoia, Psilotum, Polytrichum, Chlamydomonas, Sphagnum, Eucalyptus |
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Answer» Algae : Polysiphonia, Chlamydomonas Bryophytes : Polytrichum, Sphagnum Pteridoplyta : Cycas, Sequoia ltbgt Angiosperms : Eucalyptus |
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| 1174. |
What is the basis of classification of algae ? |
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Answer» Algae are classified into three main classes – Chlorophyceae, Phaeophyceae, and Rhodophyceae. These divisions are based on the following factors: (a) Major photosynthetic pigments present (b) Form of stored food (c) Cell wall composition (d) Number of flagella and position of insertion Class I – Chlorophyceae Common name – Green algae Major pigments – Chlorophylls a and b Stored food – Starch Cell wall composition – Cellulose Flagella number and position – 28, equal and apical Class II – Phaeophyceae Common name– Brown algae Major pigments – Chlorophylls a and c, and fucoxanthin Stored food – Mannitol and laminarin Cell wall composition – Cellulose and algin Flagella number and position – 2, unequal and lateral Class III – Rhodophyceae Common name – Red algae Major pigments – Chlorophylls a and b, and phycoerythrin Stored food – Floridean starch ltbegt Cell wall – Cellulose, pectin, and polysulphate esters Flagella number – Absent |
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| 1175. |
Which one of the following statements is wrong?A. Agar-agar is obtained from Gelidium and GracilariaB. Laminaria and Sargassum are used as foodC. Algae increase the level of dissolved oxygen in the immediate environmentD. Algin is obtained from red algae, and carrageenan from brown algae. |
| Answer» Correct Answer - D | |
| 1176. |
Conifers are adapted to tolerate extreme environmental conditions because ofA. Broad hardy leavesB. Superficial atomataC. Thick cuticleD. Presence of vessels |
| Answer» Correct Answer - C | |
| 1177. |
Conifers are adapted to tolerate extreme environmental conditions because ofA. thick cuticleB. presence of vesselsC. broad hardy leavesD. superficial stomata |
| Answer» Correct Answer - A | |
| 1178. |
Conifers are adapted to tolerate extreme environmental conditions because ofA. broad hardy leavesB. superficial stomataC. thick cuticleD. the presence of vessels |
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Answer» Correct Answer - C (c) Conifers are gymnosperms. Their leaves show xerophytic adaptations. The leaves are like needle with thick walled single layered epidermal cells covered with thick cuticle. This enables them to tolerate extreme climatic conditions. |
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| 1179. |
Conifers are adapted to tolerate extreme environmental conditons because ofA. Broad hardy leavesB. Superficial stomataC. Thick cuticleD. Presence of vessels. |
| Answer» Correct Answer - C | |
| 1180. |
Conifers are adapted to tolerate extreme environmental conditions because ofA. broad hardy leavesB. thick cuticleC. Presence of vesselsD. |
| Answer» Correct Answer - C | |
| 1181. |
An alga which can be employed as food for humna being isA. PloysiphoniaB. UlothrixC. ChlorellaD. Spirogyra |
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Answer» Correct Answer - C An alga which can be employed as a food for human being is Chlorella and Spirulina. |
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| 1182. |
To which group of plants does the Banyan tree belongA. angiospermsB. GymnospermsC. cryptogamsD. phaeophyta |
| Answer» Correct Answer - A | |
| 1183. |
Pyrenoid consists ofA. Protein besides starchB. Protein around starchC. Starch around proteinD. Both A and C |
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Answer» Correct Answer - D Pyrenoid consists of protein besides starch or starch around protein. |
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| 1184. |
Fern character in Cycas isA. Coralloid rootsB. Tap root systemC. Circinate venationD. Reticualte venation |
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Answer» Correct Answer - c Fern character in cycas is circinate venation in which younger leaf is colled like a spring from apex downwards. |
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| 1185. |
Read the following statements and find out the incorrect statement.A. Algae usually reproduce vegetatively by fragmentation, asexually by formation of different types of spores and sexually by formation of gametes.B. Algae are classified into three classes, pteridophytes into four classes and angiosperms into two classesC. Algae are chlorophyll bearing simple, thalloid, autotrophic and largely aquatic organisms.D. The plant body of algae is more differentiated than that of bryophytes. |
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Answer» Correct Answer - D The plant body of bryophytes is more differentiated than that of algae. |
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| 1186. |
Coralloid roots of Cycas are useful inA. `N_(2)-`fixationB. Absroption of waterC. TranspirationD. Fixation |
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Answer» Correct Answer - a Anabaena, Nostoc and bacteria are found in coralloid roots hence it helps in fixation absorption of nitrogen. |
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| 1187. |
In which alga, motile colonies are found ?A. VolvoxB. SpirogyraC. UlothrixD. All of the above |
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Answer» Correct Answer - A Motile colonies are found in Volvox. |
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| 1188. |
In contrast to algae, fungiA. are multicellularB. have chitinised cell wallsC. are non-chlorophyllousD. Both B and C |
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Answer» Correct Answer - D In contrast to algae, fungi have chitinised cell walls and are non-chlorophyllous. |
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| 1189. |
Sterile part of Cycas microsporophyll isA. ApophysisB. SporophoreC. Middle partD. Lower part |
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Answer» Correct Answer - a The terminal sterile portion of the sporophyll is called apophysis. |
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| 1190. |
In Selaginella male gametes areA. AlfagellatedB. MonoflagellatedC. BiflagellatdD. Multiflagellated |
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Answer» Correct Answer - c Sperms (antherozoids) of Selaginella are 128-256 in number and biflagellated sicide shaped (curved). |
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| 1191. |
Which of the following is obtained from algaeA. WaxB. ButterC. CocolateD. Cerrangenin |
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Answer» Correct Answer - d Carragenin is obtained from chondrus. It is member of Rhodophyceae. |
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| 1192. |
Match the column I and II, and choose the correct combination from the options given `{:(,underset(("Class"))("Column-I"),,underset(("Stored food material"))("Column-II")),("a.","Chlorophyceae","(i)","Floridean starch"),("b.","Phaeophyceae","(ii)","Starch"),("c.","Rhodoohyceae","(iii)","Laminain and mannitol"):}`A. a-i,b-ii,c-iiiB. a-ii,b-iii,c-iC. a-i,b-iii,c-iiD. a-ii,b-i,c-iii |
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Answer» Correct Answer - B `{:("Chlorophyceae","Starch"),("Phaeophyceae","Laminarin adn mannitol"),("Rhodophyceae","Floridean starch"):}` |
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| 1193. |
Polyembryony seen in Cycas isA. Potential true polyembryonyB. Potential true polyembryony and cleavage polyembryonyC. Adventive polyembroyonyD. All of these |
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Answer» Correct Answer - a In one young seed only one embryo remains at maturity and others perish are called potential true polymbryony. |
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| 1194. |
Which of the following does not belong to SelaginellaA. RamentaB. TrabeculaeC. RhizophoreD. Ligule |
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Answer» Correct Answer - a Ramenta or scales are found is Pteris, Dryopteris (fern). |
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| 1195. |
The evidence for aquatic origin of bryophytes isA. Ciliated spermsB. Green colourC. Protonema threadD. Some are still aquatic |
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Answer» Correct Answer - a In bryophytes, water is essential for fertilization because antherozoids are flagellated or cillary structure which represent the aquatic origin of bryophytes. |
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| 1196. |
The secondary growth in sterm of Cycas is brought about byA. peristent cambiumB. Short lived cambiumC. Number of cambia produced in successionD. Isolated strips of cambium |
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Answer» Correct Answer - c Secodnary growth is carried by successive rings of cambia (as 22 rings of vascular tissues are observed). |
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| 1197. |
The element present in thyroxis is obtained from Or Iodine is found inA. LaminariaB. PolysiphoniaC. PorphyraD. Gelidium |
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Answer» Correct Answer - a Laminaria kelp is the source of iodine. |
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| 1198. |
Polystelic sterm is seen inA. CycasB. RicciaC. SelaginellaD. Funaria |
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Answer» Correct Answer - c Stele has polystelic structure with xylem in the center. Phloem on the outside and pericycle covering the latter in Selaginella. |
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| 1199. |
Algae differ from Byroyphyta in possessingA. Naked are organsB. Chlorphylls `alpha` and `beta`C.D. Aerobic repiration |
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Answer» Correct Answer - a Algae differ from bryophyta because in algae sex organs are usually non-jacketed and in bryohyta sex organs are jacketed with sterile jacket. |
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| 1200. |
Red rust of tea is caused byA. CephaleurosB. SunchytriumC. MucorD. Fusartium |
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Answer» Correct Answer - a Parastic algae like Cephaleuros (green alga) causes red rust of tea leaves and C. coffea attacks coffee leaves. It is red due to haematochrome. |
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