MCQOPTIONS
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MCQOPTIONS
This section includes 274 Mcqs, each offering curated multiple-choice questions to sharpen your UPSC IAS Exam knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Column-I Column-IIA.Wing of a bat and wing of a birdP.darwinB. Dihybrid ratioQ.MendelC. Natural selectionR.Analogous organD. Arm of a man and wing of a birdS.Homologous organs |
| A. | A-S; B-P; C-Q; D-R |
| B. | A-R; B-Q; C-P; D-S |
| C. | A-R; B-Q; C-P; D-S |
| D. | A-S; B-P; C-P; D-Q |
| Answer» C. A-R; B-Q; C-P; D-S | |
| 152. |
The book 'Origin of Species' was written by |
| A. | Darwin |
| B. | Lamarck |
| C. | Mendel |
| D. | de Vries |
| Answer» B. Lamarck | |
| 153. |
Energy is maximum in ............... trophic level and minimum in the ............... trophic level |
| A. | producer, consumer |
| B. | consumer, decomposer |
| C. | top, Bottom |
| D. | bottom, Top |
| Answer» E. | |
| 154. |
Consider the following statements : A. Earth is kept warm due to greenhouse flux. B. The reproduction and other activities of living organisms are affected by the abiotic components of ecosystem. C. Ecology is the scientific study of the interaction of organisms with each other and the environment. Which of these statement(s) is/are correct? |
| A. | A and B |
| B. | B and C |
| C. | A, B and C |
| D. | None of these |
| Answer» D. None of these | |
| 155. |
Flow of energy in an ecosystem is always |
| A. | Unidirectional |
| B. | Bidirectional |
| C. | Multi directional |
| D. | No specific direction |
| Answer» B. Bidirectional | |
| 156. |
The accumulation of non-biodegradable substances in a food chain in increasing amount at each higher trophic level is known as: |
| A. | Accumulation |
| B. | Eutrophication |
| C. | Pollution |
| D. | Bio magnification |
| Answer» E. | |
| 157. |
Modem man evolved from |
| A. | Java man |
| B. | Peking man |
| C. | Neanderthal man |
| D. | cro-magnon man |
| Answer» E. | |
| 158. |
The last chain of food are |
| A. | Producers |
| B. | Decomposers |
| C. | Parasites |
| D. | None of the above |
| Answer» C. Parasites | |
| 159. |
Which one of these is not a food chain |
| A. | Trees \[\to \] Deer \[\to \] Lion |
| B. | Plants \[\to \] Man \[\to \] Anaconda |
| C. | Plants \[\to \] Insects \[\to \] Frog \[\to \] Snake \[\to \] Kite |
| D. | Small \[\to \] plants \[\to \] Crabs \[\to \] Fish \[\to \] Swan \[\to \] bird |
| Answer» C. Plants \[\to \] Insects \[\to \] Frog \[\to \] Snake \[\to \] Kite | |
| 160. |
All producers are |
| A. | Food making organisms |
| B. | Make food in the presence of sunlight with chlorophyll |
| C. | All autotrophs |
| D. | All the above |
| Answer» E. | |
| 161. |
All are ecosystems except |
| A. | Forest |
| B. | Grassland |
| C. | Garden |
| D. | Sun |
| Answer» E. | |
| 162. |
With reference to soil conservation, consider the following practices: [IAS Prelim] 1. Crop rotation 2. Sand fences 3. Terracing 4. Wind breaks Which of the above are considered appropriate methods for soil conservation in India. |
| A. | 1, 2, and 3 only |
| B. | 2 and 4 only |
| C. | 1, 3 and 4 only |
| D. | 1, 2, 3 and 4 |
| Answer» E. | |
| 163. |
List-I (Indian wild life species) List-II (Scientific names) [IAS Prelim]A. Asiatic wild ass tragocamelus1.BoselaphusB.Barasingha2.Cervus duvauceliC.Chinkara3.Equus hemionnsD.Nilgai4.Gazella gazella |
| A. | A-2; B-3; C-1; D-4 |
| B. | A-3; B-2; C-4; D-1 |
| C. | A-2; B-3; C-4; D-1 |
| D. | A-3; B-2; C-1; D-4 |
| Answer» C. A-2; B-3; C-4; D-1 | |
| 164. |
Polar bears are carnivores and prey on many arctic birds and fishes. However, under natural conditions, no one found polar bears predating any penguin. This is because [CDS] |
| A. | penguins have chemical substance in their muscles which is toxic to polar bears |
| B. | penguins are gregarious and always move in groups. Therefore, a polar bear cannot approach them |
| C. | polar bears and penguins never coexist under natural conditions. The former lives in the North Pole while the latter lives in the South Pole |
| D. | None of these |
| Answer» B. penguins are gregarious and always move in groups. Therefore, a polar bear cannot approach them | |
| 165. |
Which one of the following is not a feature of eutrophic lakes? [CDS] |
| A. | Blooms are frequent in eutrophic lakes |
| B. | Plant nutrient flux is high |
| C. | Primary productivity is low |
| D. | Dominated by blue green algae |
| Answer» D. Dominated by blue green algae | |
| 166. |
The branches of this tree root themselves like new trees over a large area. The roots then give rise to more trunks and branches. Because of this characteristic and its longevity, this tree is considered immortal and is an integral part of the myths and legends of India. Which tree is this? [CDS] |
| A. | Banyan |
| B. | Neem |
| C. | Tamarind (Imli) |
| D. | Peepal |
| Answer» D. Peepal | |
| 167. |
Which of the following is not a bird? [CDS] |
| A. | Bat |
| B. | Emu |
| C. | Kiwi |
| D. | Ostrich |
| Answer» B. Emu | |
| 168. |
The scientific name for the maximum modem man among these is |
| A. | Homosapiens |
| B. | Human species |
| C. | Neanderthalensis |
| D. | Homo sapiens |
| Answer» E. | |
| 169. |
In the context of ecology and environment, what does the Red Data Book pertain to? [CDS] |
| A. | Details of harmful levels of various pollutants |
| B. | A complete list of all endangered plants and animals |
| C. | A description of the consequences of nuclear holocaust |
| D. | A description of the sociological and psychological consequence of genetically modified plants and animals |
| Answer» B. A complete list of all endangered plants and animals | |
| 170. |
Which one of the following processes of weathering belongs to both mechanical and chemical weathering? [NDA] |
| A. | Crystallization |
| B. | Exfoliation |
| C. | Hydration |
| D. | Carbonation |
| Answer» C. Hydration | |
| 171. |
A biogeographic region with significant reservoir of biodiversity that is under threat from humans is called as [NDA] |
| A. | bio endangered region |
| B. | bio diversity hotspot |
| C. | bio diversity reservoir |
| D. | environmentally endangered region |
| Answer» C. bio diversity reservoir | |
| 172. |
Who proposed that the first form of life come from pre-existing non- living molecules? |
| A. | Oparin and Haldane |
| B. | de Vries and Haldane |
| C. | Darwin and Lamarck |
| D. | Louis Pasteur and Miller |
| Answer» B. de Vries and Haldane | |
| 173. |
What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors? |
| A. | Shortening of jaws |
| B. | Binocular vision |
| C. | Increasing cranial capacity |
| D. | Upright posture. |
| Answer» D. Upright posture. | |
| 174. |
Column-I (Name of the Scientist) Column- II (Contributions) A. Charles Darwin I. Mutation theory B. Lamarck II. Germ plasm theory C. Hugo de Vries Zoologique III. Philosophic D. Ernst Haeckel species IV. The Origin ofE. August WeismannV. Biogenetic law VI. Essay on population |
| A. | A-IV; B-III; C-1; D-V; E-II |
| B. | A-IV; B-III; C-V; D-I; E-VI |
| C. | A-IV; B-VI; C-V; D-III; E-I |
| D. | A-II; B-III; C-I; D-V; E-II |
| Answer» B. A-IV; B-III; C-V; D-I; E-VI | |
| 175. |
The term 'Survival of Fittest' was used by |
| A. | Charles Darwin |
| B. | Herbert Spencer |
| C. | Jean Baptiste |
| D. | Hugo de Vries |
| Answer» C. Jean Baptiste | |
| 176. |
Analogous organs are |
| A. | different in origin but perform similar functions. |
| B. | common in origin and perform common functions. |
| C. | common in origin but perform different functions. |
| D. | different in origin and perform different functions. |
| Answer» B. common in origin and perform common functions. | |
| 177. |
In terms of the evolution of organisms, which one among the following is the most advanced? [NDA] |
| A. | Bat |
| B. | Pigeon |
| C. | Shark |
| D. | Vulture |
| Answer» B. Pigeon | |
| 178. |
To which of the following types of animals are Salamanders closely related? [NDA] |
| A. | Dolphins and Whales |
| B. | Frogs and Toads |
| C. | Prawns and Crabs |
| D. | Seals and Walruses |
| Answer» C. Prawns and Crabs | |
| 179. |
In evolution which animals class is between entirely water living to land |
| A. | fishes and reptile |
| B. | fishes & reptiles |
| C. | reptiles and Amphibion |
| D. | reptiles and birds |
| Answer» D. reptiles and birds | |
| 180. |
Vestigial organs are those present in the living beings without functions gives and mark the correct option for vestigeal organs in humans |
| A. | Vermifrom appendix |
| B. | mammary glands of male |
| C. | nicitating membrane in eyes |
| D. | all of the above |
| Answer» E. | |
| 181. |
Speciation is |
| A. | making of independent species |
| B. | macro evolution |
| C. | new environmental ways for existence |
| D. | all of the above |
| Answer» E. | |
| 182. |
Fossils are |
| A. | remains of deadly plants and animals that are extinct |
| B. | remains of plants and animals that are still surviving |
| C. | both [a] & [b] |
| D. | none of the above |
| Answer» D. none of the above | |
| 183. |
Rough endoplasmic reticulum is concerned with |
| A. | Protein synthesis |
| B. | Fat synthesis |
| C. | Respiration |
| D. | Photosynthesis |
| Answer» B. Fat synthesis | |
| 184. |
Among the following animals, choose the one having three pairs of legs. [CDS] |
| A. | Spider |
| B. | Scorpion |
| C. | Bug |
| D. | Mite |
| Answer» D. Mite | |
| 185. |
Cyanobacteria are |
| A. | Mosses which attack bacteria |
| B. | Bacteria which attack cyanophyceae |
| C. | Autotrophic organisms with phycocyanin |
| D. | None of these |
| Answer» D. None of these | |
| 186. |
The most abundant compound in cytoplasm is |
| A. | fat |
| B. | water |
| C. | protein |
| D. | carbohydrates |
| Answer» C. protein | |
| 187. |
Nucleolus is |
| A. | rounded structure found in cytoplasm near nucleus. |
| B. | rounded structure inside nucleus and having rRNA. |
| C. | rod-shaped structure in cytoplasm near the nucleus. |
| D. | none of the above. |
| Answer» C. rod-shaped structure in cytoplasm near the nucleus. | |
| 188. |
Which one among the following groups of animals maintains constant body temperature in changing environmental conditions? [CDS] |
| A. | Birds |
| B. | Fishes |
| C. | Amphibians |
| D. | Reptiles |
| Answer» B. Fishes | |
| 189. |
Which one of the following is a free living bacterium that helps in nitrogen fixation in soil? [CDS] |
| A. | Azotobacter |
| B. | Anabaena |
| C. | Azolla |
| D. | Nostoc |
| Answer» B. Anabaena | |
| 190. |
Which of the following statement is incorrect? |
| A. | Mycoplasma is the smallest cell (0.3\[\mu \]). |
| B. | Bacteria are 3 to 5 urn in size. |
| C. | The largest cell is the egg of an ostrich. |
| D. | Nerve cells are some of the smallest cells. |
| Answer» E. | |
| 191. |
Bryophytes are photosynthetic but do not have vascular tissue and true roots. This feature enables them to resemble with which of the following? [CDS] |
| A. | Fungi |
| B. | Algae |
| C. | Pteridophytes |
| D. | Angiosperms |
| Answer» C. Pteridophytes | |
| 192. |
Which one of the following is responsible for converting milk into curd? [CDS] |
| A. | Fungi |
| B. | Bacteria |
| C. | Virus |
| D. | None of these |
| Answer» C. Virus | |
| 193. |
Mitochondria are absent in |
| A. | green algae |
| B. | brown algae |
| C. | cynobacteria and bacteria |
| D. | all above |
| Answer» D. all above | |
| 194. |
Which of the followings are correct order of hierarchy? |
| A. | Kingdom, division, phylum, genus and species |
| B. | Phylum, division, genus and class |
| C. | Kingdom, genus, class, phylum and division |
| D. | Phylum, kingdom, genus, species and class |
| Answer» B. Phylum, division, genus and class | |
| 195. |
Angiosperms have |
| A. | tracheids and vessels |
| B. | tracheids only |
| C. | vessels only |
| D. | tracheids and albuminous cells |
| Answer» B. tracheids only | |
| 196. |
An important character of chordata is presence of |
| A. | dorsal notochord |
| B. | dorsal hollow nerve cord |
| C. | post-anal tail |
| D. | all the above |
| Answer» E. | |
| 197. |
Recombination involves |
| A. | crossing over |
| B. | chromosome duplication |
| C. | spindle formation |
| D. | cytokinesis |
| Answer» B. chromosome duplication | |
| 198. |
Basic taxonomic category is |
| A. | population |
| B. | species |
| C. | variety |
| D. | breed |
| Answer» C. variety | |
| 199. |
Plants that grow in the desert are called |
| A. | hydrophytes |
| B. | mesophytes |
| C. | xerophytes |
| D. | epiphytes |
| Answer» D. epiphytes | |
| 200. |
Who was the first to describe that species is the unit of classification? |
| A. | John Ray |
| B. | Huxley |
| C. | Linnaeus |
| D. | Candoll |
| Answer» B. Huxley | |