InterviewSolution
Saved Bookmarks
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.
| 201. |
Pyramid of number is upright in one of the following ecosystem.A. GrasslandB. TreeC. PondD. Both (a) and (b) |
| Answer» Correct Answer - D | |
| 202. |
The biomass of each succeeding trophic level isA. more than the one precedingB. less than the one precedingC. constantly fixedD. equal to next trophic level |
| Answer» Correct Answer - A | |
| 203. |
The trophic level of Cuscuta, Orobanche and Albygo isA. DecomposerB. Primary producerC. Primary consumersD. Secondary consumers |
|
Answer» Correct Answer - C Because these plants are parasitic in nature. |
|
| 204. |
Which one lacks both roots and stomataA. HydrophytesB. MesophytesC. HygrophytesD. Halophytes |
|
Answer» Correct Answer - A Roots of hydrophytes are poorly developed completely absent in Wolffia. Stomata are absent in submerged plants. But floating hydrophytes have stomata on upper surface. E.g., Lotus. |
|
| 205. |
An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be havingA. Low satbility and high resilienceB. High satbility and low resilienceC. Low satbility and low resilienceD. High satbility and high resilience |
|
Answer» Correct Answer - A Stability is the power of a system to be in their state against unfavourable factor. resilience is the capability of regaining its original shape or position after being deformed.hence, it has low stsbility and high resilience. |
|
| 206. |
Choose the correct match. Bladderwort , sundew, venus, flytrapA. Nepenthes, dionea, droseraB. Nepenthes, utricularia,dioneaC. Utricularia, drosera, dioneaD. Dionea, trapa, vanda |
|
Answer» Correct Answer - C Utricularia, drosera and dionaea are also known as bladderwort, sundew and venus fly trap, respectively. |
|
| 207. |
Based on the source of their nutrition or food, organism occupy a specific place in the food chain that is known as theirA. Standing cropB. standing stateC. Trophic levelD. Pyramid |
|
Answer» Correct Answer - C Based on the source of their nutrition or food, organism occupy a specific place in the food chain that is known as their trophic level. |
|
| 208. |
Approximately how much of the chemical energy within producer tissue becomes chemical energy within herbivore tissue?A. `01%`B. `30%`C. `10%`D. `90%` |
| Answer» Correct Answer - C | |
| 209. |
Some common herbivore in terrestrial ecosystem areA. InsectsB. BirdsC. MammalsD. All of the above |
|
Answer» Correct Answer - D Some common herbivores of the terrestrial ecosystem are insects, birds and mammals. |
|
| 210. |
In a trophic level a herbivore animal occuples which trophic level ?A. IstB. II ndC. IntermediateD. III rd |
| Answer» Correct Answer - B | |
| 211. |
What will happen if all producers are removed from ecosystem? |
|
Answer» Producers are the autotrophs which occupy the first tropic level in an ecosystem. The energy produced by them is utilized by the herbivores and then by carnivores, thereby maintaining the stability of ecosystem. If producers are removed from an ecosystem, it would lead to starvation and death of herbivores and subsequently the carnivores, thus terminating the entire food web. |
|
| 212. |
What will happen to an ecosystem if a. All producers are removed; b. All organisms of herbivore level are eliminated; and c. All top carnivore population is removed. |
|
Answer» a. Reduction in primary productivity. No biomass available for consumption by higher trophic levels/heterotrophs and hence heterotrophs also die of starvation. b. Increase in primary productivity and biomass of producers. Carnivore population will subsequently dwindle due to food shortage. c. Increase in number of herbivores which leads to over-grazing by herbivores, finally resulting in desertification. |
|
| 213. |
Herbivore of an ecosystem is calledA. producerB. consumerC. decomposerD. carnivores |
| Answer» Correct Answer - B | |
| 214. |
Which one of the following pairs is mismatched.?A. Savanna-Acacia treesB. Coniferous forest - Evergreen treesC. Tundra- PermafrostD. Prairies - Epiphytes |
| Answer» Correct Answer - D | |
| 215. |
Which one of the following is mismatched ?A. Biomass burning - Release of `CO_(2)`B. Fossil fuel burning -Release of `CO_(2)`C. Nuclear power - Radioactive wastesD. Solar enery -Green house effect |
|
Answer» Correct Answer - D Solar energy is not responsible for green-house effect instead it is a source of energy for the plants and animals. Green plants prepare their food by the use of this solar energy . `CO_(2)` gas is mainly responsible for greenhouse effect. Excess of this gas forms a thick layer around the earth and prevents re-radiation of earth climate entering sun rays to atmosphere. Thus, functions like the glass pannels of a green house ( or the glass window of a motor car ). This is thus , called greenhouse effect. |
|
| 216. |
Major utillisation of carbon from atmosphere is throughA. DecompositionB. PhotosynthesisC. RespirationD. Human activities |
| Answer» Correct Answer - B | |
| 217. |
Area where succession can take several thoudands years to reach climax community isA. Burnt and cut forestB. Sand dunesC. Flooded landD. Abandonend farm lands |
| Answer» Correct Answer - D | |
| 218. |
A: Neither the community modifies environment nor the environment forces the community to leave the palce in climax stage of succession. R: Climax community is xerophytic in most of the types of succession.A. If both Assertion &Reason are true and the reason is the corect explanation of the assertion , then mark (1)B. If both Assertion & Reason are true but the reason, is not the correct explanation of the assertion , then mark (2)C. If Assertion is true statement but Reason is false , them mark (3).D. If both Asseration and Reason are false statements , then mark (4). |
| Answer» Correct Answer - C | |
| 219. |
Ascending trophic level in grazing food chain pyramid representsA. gradual decrease in biomass from apex to baseB. gradual decrease in biomass from base to the apexC. gradual increase of the biomass from producers to the tertiary consumersD. no change in biomass |
| Answer» Correct Answer - B | |
| 220. |
How do iron levels affect phytoplankton population in a marine ecosystem ?A. Without iron, eukaryotic phytoplankton population fall because they cannot convert atmospheric `N_(2)` to nitrogenous mineralsB. In the presence of too nuch iron, eukaryotic phytoplankton populations fall because they cannot convert atmospheric `N_(2)` to the nitrogenous mineralsC. Iron stimulates the growth of cyanobacteria, which converts atmospheric `N_(2)` to nitrogenous minerals , stimulating the growth of phytoplanktonD. Iron halts the growth of cyanobacteria, which converts atmospheric `N_(2)` to nitrogenous minerals. Therefore, phytoplankton population are limited |
| Answer» Correct Answer - C | |
| 221. |
Phytoplankton are dominant inA. limnetic zoneB. profundal zoneC. littoral zoneD. benthic zone |
| Answer» Correct Answer - A | |
| 222. |
Burning of fossil fuels affects one of the folowing cycles in natureA. water cycleB. nitrogen cycleC. phosphorous cycleD. carbon cycle |
| Answer» Correct Answer - D | |
| 223. |
Maximum contribution of oxgyen is got fromA. grasslandsB. phytoplanktonC. dense forestsD. herbs and shrubs |
| Answer» Correct Answer - B | |
| 224. |
All populations in a given physical area are defined asA. populationB. ecosystemC. biotic communityD. territory |
| Answer» Correct Answer - A | |
| 225. |
Most animals that live in deep oceanic waters are:A. DetritivoresB. Primary consumersC. Secondary consumersD. Tertiary consumers |
| Answer» Correct Answer - B | |
| 226. |
During ecological succession:A. The changes lead to a community that is in near equilibrium with the environment and is called pioneer communityB. The gradual and predictable change in species composition occurs in a given areaC. The establishment of a new biotic community is very fast in its primary phaseD. The number and types of animals remain constant |
| Answer» Correct Answer - C | |
| 227. |
In which of the following both pairs have correct combination ? |
| Answer» Correct Answer - C | |
| 228. |
In which of the following both pairs have correct combination?A. `{:("Gaseous nutrient cycle Sedimentary nutrient cycle" ,,"Carbon and Sulphur Nitrogen and Phosphorus"):}`B. `{:("Gaseous nutrient cycle Sedimentary nutrient cycle" ,,"Carbon and Nitrogen Sulphur and Phosphorus"):}`C. `{:("Gaseous nutrient cycle Sedimentary nutrient cycle" ,," Nitrogen and Sulphur carbon and Phosphorus"):}`D. `{:("Gaseous nutrient cycle Sedimentary nutrient cycle" ,," Sulphur and Phosphorus carbon and Nitrogen"):}` |
| Answer» Correct Answer - B | |
| 229. |
In which of the following both pairs have correct combination?A. `{:("Gaseous nutrient cycle", "Sulphur and Phosphorus"),("Sedimentary nutrient cycle", "Carbon and Nitrogen"):}`B. `{:("Gaseous nutrient cycle", "Sedimentary nutrient cycle"),("Carbon and Nitrogen", "Sulphur and Phosphorus"):}`C. `{:("Gaseous nutrient cycle", "Carbon and Sulphur"),("Sedimentary nutrient cycle", "Nitrogen and Phosphorus"):}`D. `{:("Gaseous nutrient cycle", "Nitrogen and Sulphur"),("Sedimentary nutrient cycle", "Carbon and Phosphorus"):}` |
| Answer» Correct Answer - B | |
| 230. |
In which of the following both pairs have correct combination ? |
|
Answer» Correct Answer - D Nutrient cycling are of two types :1. Gaseous (e.g. C and N cycles) and 2. Sedimentary (e.g. P and S cycles). |
|
| 231. |
During ecological succession:A. The gradual and predictable chang in specile composition occuirs in a givin areaB. The establishment of a new biotic commuunity is very fast in its primary phaseC. The number and types of animals remani constantD. The changes lead to a community that is in near equilibrium with the environment and is called pioneer community |
|
Answer» Correct Answer - A The gradul and fairly predictable change in the species composition of a given area is called ecological succession. During succession some species colonise an area and their populations become more numerous, shereas poulations of other species decline and even disappear. |
|
| 232. |
Which one of the following is a characteristic feature of cropland ecosystem?A. Least genetic diversityB. The absence of weedsC. Ecological successionD. The absence of soil organisms |
|
Answer» Correct Answer - A Cropland ecosystem is largest anthropogenic ecosystem characterised by less diversity and high productivity. |
|
| 233. |
In which of the following both pairs have correct combination?A. `{:("Gaseous nutrient cycle","Carbon and nitrogen"),("Sedimentary nutrient cycle","Sulphur and phosphorus"):}`B. `{:("Gaseous nutrient cycle","Carbon and nitrogen"),("Sedimentary nutrient cycle","Nitrogen and phosphorus"):}`C. `{:("Gaseous nutrient cycle","Carbon and nitrogen"),("Sedimentary nutrient cycle","Carbon and phosphorus"):}`D. `{:("Gaseous nutrient cycle","Carbon and nitrogen"),("Sedimentary nutrient cycle","Carbon and nitrogen"):}` |
|
Answer» Correct Answer - A The biogeochemical cycles are of two types, i.e. gaseous cycles, in which the reservoir for the nutrient elements is in the atmosphere (air )or hydrosphere (water). The four most abundant elements in the living systems, i.e. hydrogen. Carbon, oxygen and nitrogen have predominntly gaseous cycles. |
|
| 234. |
The primary producers of the deep-sea hydrothermal vent ecosystem are:A. Green algaeB. Chemosynthetic bacteriaC. blue-green algaeD. coral reefs |
|
Answer» Correct Answer - B The primary producers of the deep-sea hydrothermal vent ecosystem are archaebacteria. These have chemosynthetic mode of nutrition. Thus option (b)b,I.e. chemosynthetic bacteria is the correct option. |
|
| 235. |
The primary producers of the deep-sea hydrothermal vent ecosystem are:A. Green algaeB. Chemosynthetic bacteriaC. Blue - green algaeD. Coral reefs |
| Answer» Correct Answer - B | |
| 236. |
The primary producers of the deep-sea hydrothermal vent ecosystem are:A. Blue-green alageB. Coral reefsC. Green algeeD. Chemosynthetic bacteria |
| Answer» Correct Answer - A | |
| 237. |
The response of different organisms to environmental rhythms of light and darkness is called:A. PhototaxisB. PhototropismC. VernalisationD. Photoperiodism |
|
Answer» Correct Answer - D Photoperiodism is the term to denote a biological response to changes in the ratio of light and darkness in a 24 hour cycle. |
|
| 238. |
During his tour to a renowned forest Ravi saw a highway being constructed which passes of through the middle of the forest .He was unhappy . On return he contracted the local Eco club and approached the concerned department to stop the work. a) What values did Ravi reflect here? b) What would be the effect on ecosystem if the highway is constructed? |
|
Answer» Love for nature and environmental consciousness. He was brave focussed having vision to see the disaster in the future. Ecosystem is disturbed .Animals get confined to smaller area. Fragmentation characteristically reduces species richness and taxon diversity and may reduce the efficacy of ecosystem functioning. |
|
| 239. |
Lichen is pioneer in successionA. HydrosphereB. LithosphereC. PsammosereD. Xerosere |
|
Answer» Correct Answer - B Lichen is pioneer in succession in lithosere. |
|
| 240. |
Which is the community next to lichen that occur in xerarch succession. |
|
Answer» Moss stage is the community next to lichen that occur in xerarch succession. |
|
| 241. |
Lichen is pioneer in succession ofA. hydrosereB. lithosereC. psammosereD. xerosere |
| Answer» Correct Answer - B | |
| 242. |
Mark the correct pairA. Plants growing in shady places-HeliophytesB. Plants growing in light-SciophytesC. Plants growing in saline soil-HalophytesD. Roots are absent-Xerophytes |
| Answer» Correct Answer - C | |
| 243. |
Which is adapted for aquatic habitA. AldrovendaB. VallisneriaC. SancatiaD. All of these |
| Answer» Correct Answer - B | |
| 244. |
In an ecosystem, the population ofA. Primary producers are more than that of primary consumersB. Secondary consumers are largest because they are powerfulC. Primary consumers out number primary producersD. Primary consumers are least dependent upon primary producers |
| Answer» Correct Answer - A | |
| 245. |
Which of the following supports a dense population of plankton and littoral vegetationA. OligotrophicB. EutrophicC. LithotrophicD. Agroecotrophic |
| Answer» Correct Answer - B | |
| 246. |
Lichen is the pioneer vegetation of which succession?A. HydrosereB. LithosereC. PsammosereD. Xerosere |
| Answer» Correct Answer - B | |
| 247. |
Rhizophora is characteristic member ofA. Marsh plantsB. Swamp forestsC. Mangrove vegetationD. Salt Swamp |
|
Answer» Correct Answer - C A few mangroveplants secrete salts from their roots. Some have water storage tissues to dilute salt, e.g., Rhizophora (Red Mangrove). |
|
| 248. |
Benthic organism are affected most byA. Light reaching the forest floorB. Surface turbulence of waterC. Sediment characteristics of aquatic ecosystemsD. Water-holding capacity of soil |
|
Answer» Correct Answer - C The sediment characteristics often determine the type of benthic animals that can thrive there. |
|
| 249. |
If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain? Plant `rarr` Mice `rarr` Snake `rarr` PeacockA. 0.0002 JB. 0.02 JC. 0.02 JD. 0.2 J |
|
Answer» Correct Answer - B `{:("Plant" overset(10%)to"Mice " overset(10%)to "Snake" overset(10%)to "Peacock"),(20J" "2J" "0.2 J" "0.02J):}` |
|
| 250. |
Characteristic feature of mangrove plants isA. ViviparyB. HeterosporyC. ParthenocarpyD. Apospory |
|
Answer» Correct Answer - A Mangroves are halphytes and vivipary is its characteristic. Vivipary is the germination of seed inside the fruit while it is still attachedd to the plante.g., Avicennia, Rhizophora, Sonneratia, Salsola etc. |
|