Saved Bookmarks
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.
| 251. |
Composition of organic matter in soil is aboutA. `20%`B. `5%`C. `10%`D. `15%` |
| Answer» Correct Answer - B | |
| 252. |
Who determine the percolation and water holding capacity of the soils? a. Soil compositionb. Grain sizec. Aggregationd. pHe. Mineral compositionf. TopographyA. a, b and cB. d, e and fC. a, b, c, d and eD. a, b, c, d, e and f |
|
Answer» Correct Answer - A The percolation and water holding capacity of the soils are determined by soil compsition, grain size and aggregation. |
|
| 253. |
Assertion : In open water zone upto the depth to which light can penetrate , called photic zone . Reason : The photic zone is categorised into euphotic and disphotic zone .A. If both A and R are true and R is the correct explanation of A .B. If both A and R are true but R is not the correct explanation of A .C. If A is true but R is false .D. If both A and R are are false . |
| Answer» Correct Answer - B | |
| 254. |
Soil water that is available to the plant isA. gravitational waterB. hygroscopic waterC. capillary waterD. None of these |
| Answer» Correct Answer - A | |
| 255. |
Water holding capacity is highest inA. Sandy soilB. Slit soilC. Clay soildD. Loam soil |
|
Answer» Correct Answer - C Water holding capacity is highest in clay soil. |
|
| 256. |
Soil water available to rootsisA. Surface waterB. Hygroscopic waterC. Gravitational waterD. Capillary water |
|
Answer» Correct Answer - D Soil water available to roots is capilliary water. |
|
| 257. |
Stomato open at night inA. SucculentsB. XerophytesC. HydrophytesD. Mesophytes |
|
Answer» Correct Answer - A Stomata open at night in succulents. |
|
| 258. |
Soil water available to rootsisA. Surface waterB. Hygroscopic waterC. Gravitational water D. Capillary water |
|
Answer» Correct Answer - D Soil water available to roots is capilliary water. |
|
| 259. |
Tropical forests occur in IndiaA. Jammu and KashmirB. RajasthanC. Kerala and AssamD. These forests do not occur in India |
|
Answer» Correct Answer - C Tropical forests occur in India Kerala and Assam. |
|
| 260. |
Assertion: On planet Earth, life exist not just in a few favourable habitats but even in extreme and harsh habitats such as according Rajasthan deserty, perpetually rain-soaked Meghalaya forest, deep ocean trenches, torrential streams, permafrost polar regions, high mountian tops, streams, permafrost polar regions, high mountains tops, boiling thermal springs, and stinking compost pits, etc. Reason: Even our intestine is a unique habitat for hundereds of species of microbes.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
|
Answer» Correct Answer - B a) On planet Earth, life exist not just in a few favourable habitats but even in extreme and harsh habitats such as scorching Rajasthan desert, perpetually rain-soaked Meghalaya forest, deep ocean trenches, torrential streams, permafrost polar regions, high mountain tops, boiling thermal springs, and stinking composit pits. etc. b) Even our intestine is a unique habitat for hundereds of species of microbes. |
|
| 261. |
Adapative measure to protect against extreme heat by poikilotherms isA. HibernationB. SweatingC. AestivationD. Coiling |
|
Answer» Correct Answer - C Adaptive measures to protect against extreme heat by poikilotherms is aestivatioin (summer sleep). |
|
| 262. |
During extreme aridity, Desert RatA. Stores waterB. Uses metabolic waterC. Saves waterD. Does not use water |
|
Answer» Correct Answer - B During extreme aridity, Desert Rat uses metabolic water. |
|
| 263. |
Define population and community. |
|
Answer» A group of individuals of the same species , who interbreed to produce fertile young , living together in the same geographical area at a time is called population. Community refers to groups of organisms belonging to several different species that live together in the same area or habitat and interact through trophic and spatial relationship . |
|
| 264. |
Orchid growing on other plants asA. ParasiteB. SymbiontC. PredatorD. Epiphytes. |
|
Answer» Correct Answer - D Orchid growing on other plants as epiphyte. |
|
| 265. |
Benthic organism are affected the most byA. Water-holding capacity of soilB. Light reaching the forest floorC. Light reaching the forest floorD. Surface turbulence of water |
| Answer» Correct Answer - D | |
| 266. |
Benthic organism are affected the most byA. Light reaching the forest floorB. Surface turbulence of waterC. Sediment characteristics of aquatic ecosystemD. Water - holding capacity of soil |
|
Answer» Correct Answer - C Benthic organism are affected the most by sediment characteristics of aquatic ccosystems. |
|
| 267. |
Give an example for: (a) An endothermic animal (b) An ectothermic animal (c) An organism of benthic zone . |
|
Answer» (a) Endothermic animal: Birds such as crows, sparrows, pigeons, cranes, etc. and mammals such as bears, cows, rats, rabbits, etc. are endothermic animals. (b) Ectothermic animal: Fishes such as sharks, amphibians such as frogs, and reptiles such as tortoise, snakes, and lizards are ectothermic animals. (c) Organism of benthic zone: Decomposing bacteria is an example of an organism found in the benthic zone of a water body. |
|
| 268. |
Name two animals depicting metamorphic migrations . |
| Answer» Correct Answer - Mosquitoes , Frog . | |
| 269. |
The xerophytic plants conserve water by storing it inA. intecellular spacesB. normal parenchymatous cellsC. intercellular spaces and parenchymatous cellsD. parenchymatous cells specialized for this purpose. |
| Answer» Correct Answer - D | |
| 270. |
How does a bird sing?A. Operation of the voice box (syrinx)B. Vibrating boneC. Bird need to communicate with its mate during breeding seasonD. Both A and B |
|
Answer» Correct Answer - D A bird sing due to operation of the voice box (syinx) and vibrating bone. |
|
| 271. |
Why does a bird sing?A. Operation of the voice box (syrinx)B. Vibrating boneC. Bird need to communicate with its mate during breeding seasonD. Both A and B |
|
Answer» Correct Answer - C Birds need to communicate with its mate during breeding season. |
|
| 272. |
What are stenothermal animals ? |
| Answer» Organisms having a narrow range of tolerance to temperature . | |
| 273. |
The ecological levels of organization , in terms of complexity , are arranged in the order …… |
| Answer» Organism-Population-Community - Ecosystem-Biosphere. | |
| 274. |
There are various levels of biological organisation. What is the correct sequence of the increasing complexity?A. Macromolecules, cells, tissues, organs, organisms, population, communities and ecosystem, and biomesB. Macromolecules, cells, tissues, organs, organisms, communities and ecosystems, population and biomesC. Macromolecules, cells, tissues, organs, population, communities and ecosystem, organisms and biomesD. Macromolecules, cells, tissues, organs, organisms, |
|
Answer» Correct Answer - A 1) There are 8 levels of biological organisms, from macromolecules to biomes. Macromolecules `to` Cells `to` Tissues `to` Organs `to` Organisms `to` Populations `to` Communities and Ecosystem `to` Biomes. |
|
| 275. |
Moderate rain during summer producesA. DesertB. GrasslandC. Scrub forestD. Deciduous forest |
|
Answer» Correct Answer - D Moderate rain during summer produces deciduous forest. |
|
| 276. |
Which one has the correct seqence of increasing organisational complexity?A. Population, Community, Ecosystem and BiomeB. Population, Community, Species and EcosystemC. Population, Variety, Commonly and EcosystemD. Species, variety, Ecosystem and Population |
|
Answer» Correct Answer - A The correct sequence of increasing organisational complexity is population, species, community and ecosystem, |
|
| 277. |
What is true for individuals of same species?A. Live in same nicheB. Live in same habitatC. InterbreedingD. Live in different habitat |
| Answer» Correct Answer - C | |
| 278. |
Species diversity is lowest in ecosystemA. DesertB. TundraC. Scrub forestD. Deciduous forest |
|
Answer» Correct Answer - B Species diversity is lowest in Tundra. |
|
| 279. |
Tight one-to-one relationship between plant and pollinator is found inA. Fig and waspB. Yucca and mothC. Amorphophallus and pollinatorD. All of the above |
|
Answer» Correct Answer - D Tight one -to-one relationship between plant and pollinator is found in fig-wasp, yucca-moth and Amorphophallus-pollinator. |
|
| 280. |
Natural selection operates atA. Organismal levelB. Population levelC. Community levelD. Ecosystem level |
| Answer» Correct Answer - B | |
| 281. |
Animals spending winter in dormant conditons is referred as underA. aestivationB. hibernationC. adaptationD. acclimitisation |
| Answer» Correct Answer - B | |
| 282. |
Assertion: Logistic growth model is considered a more realistic as compared to exponential growth model. Reason: Resources for growth for most animal population are finite and becomes limiting sooner or later.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
|
Answer» Correct Answer - A Since resources for growth of most animal population are finite (limited) and become limiting sooner or later. The logistic growth model is considered a more realistic one. |
|
| 283. |
Which of the following is considered as more realistic growth model ?A. Exponential growthB. Arithmetic growthC. Geometric growthD. Logistic growth |
| Answer» Correct Answer - D | |
| 284. |
Assertion Removal of keystone species does not cause any serious disruption in the functioning of the community. Reason Keystone species are low in abundance than the dominant species.A. If both Assertion and Reason are true and the Reason is the correct explanation of AssertionB. If both the Assertion and Reason are true, but the Reason is not the correct explanation of AssertionC. If Assertion is true, but the Reason is falseD. If Assertion is false, but the Reason is true |
|
Answer» Correct Answer - D Dominant species are one or few species in a community, which influence the other species in terms of numbers, production of biomass and distribution of animals, while keystone species are present in low abundance and influence other community. These species play an important role in checking the relative abundance of other species. So , the removal of keystone species cause serious disruption in the functioning of the community. |
|
| 285. |
Keystone species deserve protection because theseA. are capable of surviving in harsh environmental conditionsB. indicate presence of certain minerals in the soilC. have become rare due to overexploitationD. play an important role in supporting other species |
| Answer» Correct Answer - D | |
| 286. |
Which of the following contributes an increase in population density ?A. MortalityB. EmigrationC. NatalityD. Predation |
| Answer» Correct Answer - C | |
| 287. |
Animals which are parasites on plant areA. nematodesB. mosquitoC. aphidsD. All of these |
| Answer» Correct Answer - D | |
| 288. |
Which of the following is a keystone species?A. FigB. DeerC. MycorrhizaD. Pollinator |
| Answer» Correct Answer - A | |
| 289. |
Find the odd one out:A. Lianas in tropical rain forestB. E. coli in large intestine of manC. Pilot fish remora and sharkD. Rafflesia on the roots of a forest tree |
| Answer» Correct Answer - D | |
| 290. |
Find odd one w.r.t populationA. NatalityB. Death rateC. Age pyramidD. Births |
| Answer» Correct Answer - D | |
| 291. |
Find the odd one out:A. Viceroy butterfly resembling monarch butterflyB. Stick insect resembling thin, dry branchesC. Caterpillars of geometrid moth resembling small branchesD. Leaf insect resect resembling green leaf |
| Answer» Correct Answer - A | |
| 292. |
Most successful parasites are those which do notA. Grow freeB. Kill their hostC. Reproduce sexuallyD. Survive in soil |
| Answer» Correct Answer - B | |
| 293. |
Find the odd one out:A. MatingB. CompetitionC. AggregationD. Altruism |
| Answer» Correct Answer - B | |
| 294. |
Competition for food, light, and space is most severe between twoA. distantly related species growing in different habitatB. distantly related species growing in the same habitatC. closely related species growing in different habitatD. closely related species growing in the same area |
| Answer» Correct Answer - D | |
| 295. |
Competition for food, light, and space is most severe between twoA. Distantly related species growing in different habitat.B. Distantly related species growing in the same habitat.C. Closely related species growing in different habitat.D. Closely related species growing in the same area. |
| Answer» Correct Answer - D | |
| 296. |
A toxic chemical against nematode is secreted byA. TagetesB. Black walnutC. PenicillumD. Gravillea robusta |
| Answer» Correct Answer - A | |
| 297. |
Which one of the following is a hemiparasite?A. ViscumB. CuscutaC. RafflesiaD. None of these |
| Answer» Correct Answer - A | |
| 298. |
The species which are present in large numbers and have large size are calledA. Ecological equivalentB. Ecological dominantsC. Link speciesD. Keystone species |
| Answer» Correct Answer - B | |
| 299. |
Competition for food, light, and space is most severe between twoA. Distantly related species growing in different habitatsB. Distantly related species growing in the same habitatC. Closely related species growing in different habitatsD. Closely related species growing in the same area |
| Answer» Correct Answer - D | |
| 300. |
Competition is the most severe between twoA. Closely related species growing in different nichesB. Closely related species growing in the same habitatC. Distantly related species growing in the same habitatD. Distantly related species growing in different niches. |
|
Answer» Correct Answer - B Competition is the most serve between two closely related species growing in the same habitat. |
|