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“13.4; Population Interactions i, , 2016, , LOL, If)" sign ts assigned to beneficial interaction, © * sign to, detrimental and ‘O° sign to neutral interaction, then the, population interaction represented by *+" *—" refers to, , (a) mutualism (b) amensalism, (c) commensalism (d) parasitism., (NEET Phase-I), 102. The principle of competitive exclusion was stated by, (a) C. Darwin (b) G.F. Gause, (ec) MacArthur (d) Verhulst and Pearl., (NEET Phase-Il), , 103, Gause’s principle of competitive exclusion states that, , {a) no two species can occupy the same niche, indefinitely for the same limiting resources, , (b) larger organisms exclude smaller ones through, competition, , (c) more abundant species will exclude the less, abundant species through competition, , (d) competition for the same resources exclude species, , having different food preferences., (NEET Phase-1), , 104. Match column | with column II and select the correct, option from the codes given below., , Column I Column II, , A. Commensalism {i) One inhibited, other, unaffected, , B. Parasitism (ii) One benefitted, other, unaffected, , (iii) Both are benefitted, (iv) One benefitted, other, harmed, (a) A-(iv), B-(ii), C-(iii), D-(i), (b) A-(iii), B-(iv), C-(ii), D-(i), (c) A-(ii), B-{iv), C-(iii), D-(), (d) A-(ii), B-{iv), C-(i), D-(iii), 105. The association that includes herbivores and, phytophagous insects is called, (a) competition (b) parasitism, (c) predation (d) commensalism, , (Kerala PMT), , C. Mutualism, D. Amensalism, , (AIMS), , (e) mutualism.

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106. Connel’s field experiment on the rocky sea coast of, Scotland, where larger Bamacle balanus dominates, the intertidal area and removes the smaller Bamacle, cathamalus. This happened due to, , (a) parasitism (b) predation, (c) mutualism’ (d) competition., (Karnataka CET), , 107. All the following interactions are mutualism, except, (a) Plant and animal relation for pollination, (b) Association of algae and fungi in lichens, (c) Association of cattle egret and grazing cattle, (d) Association of fungi and roots of higher plants in, mycorthiza. (Karnataka CET), 108. In which type of interactions, both the interacting, organisms do not live close together?, , (a) Mutualism (b) Predation, (c) Competition (d) Parasitism, (Kamataka CET), , 2015, 109, In which of the following interactions both partners are, , adversely affected?, , (a) Parasitism (b) Mutualism, , (c) Competition (d) Predation (AIPM), , 110. An association of individuals of different species living, in the same habitat and having functional interactions is, , (a) ecosystem (b) population, (c) ecological niche (d) biotic community., (AIPM), , 111. Which of the following organisms cite an example of, , commensalism?, , {a) Sea anemone and clown fish, , (b) Sea anemone and hermit crab, , (c) Lichens, , (d) Balanus and Chthamalus (JIPMER), , 112. Orchids can be found associated with, (a) Oryza sativa (b) Brassica crucifera, , (c) Nerium oleander (d) Shorea robusta., (UP CPMT), 2014, , 113. Which of the following associations shows mutualism?, , (a) Fig and wasp, , (b) Bamacles on whale ’, (c) Roundworms in human intestine, (d) Orchids on mango tree (AIMS), , 114. ‘An orchid growing as an epiphyte on a mango tree is an, , example for fl, , (a) parasitism (b) predation, , () ism (d) mutualism , (ce) competition. (Kerala PMT), , 115. The interaction between the organisms of one of, following pairs is an example for commensalism, he, (a) Cattle or sheep and grass, (b) Wasps and fig tree, (c) Orchid and mango tree, (d) Cuckoo and crow (Karnataka cen, 116. The removal of *keystone” species will affect, (a) the producers (b) the consumers, , (c) the ecosystem {d)_ the decomposers., , (WB Jee), 2013, , 117, A sedentary sea anemone gets attached to the shell lining, of hermit crab. The association is, (a) commensalism (b) amensalism, (c) ectoparasitism (d) symbiosis., , 2012, , 118. Cuscuta is an example of, (a) ectoparasitism, (c) predation, , (EEN), , (b) brood parasitism, (d) endoparasitism., (AIPMT Mains), , 119, Which onc of the following microbes forms symbiotic, association with plants and helps them in their, , nutrition?, (a) Azotobacter (b) Aspergillus, (c) Glomus (d) Trichoderma, , (AIPMT Preis), 120. The interaction where one species is benefitted and the, other is neither benefitted nor harmed is called as, (a) amensalism (b) commensalism, (c) mutualism (d) predation. (J & CEN), , 121, Which of the following statements is false regarding, , predators?, , {a) Predators keep prey populations under control., , (b) Predators help in maintaining species diversity in, community., , (c) Ifa predator is not efficient, then the prey population, would become extinct., , (d) Herbivores (predators) have a greater advantaa, , since the plants cannot run away t avoid, predation., (c) Tiger is an example of a predator. (Kerala PO, 122. Match the following., Population Example, Interaction, 1. Predation A, Cuscuta and hedge, plants, 2. Commensalism B. Balanus and, Chathamalus, 3. Parasitism C. Cactus and, 4. Competition D. Orchid and maniz?, , —

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We and Populations, 2-D.#A4-B. (b) 1-D,2-C,3-B, 4-4, , 1c, PA2C.3B.4D (d) 1-C,2-D,3-B,4.A, , 6 1B, 2-D. 3-4, 4C., (Kerala PMT), aot!, the following and choose the correct inath, y} . in the options given below. —e, Column t Column I, (Population (Examples), interaction), i Mutualism — 1, Ticks on dogs, B. Commensalism 2. Balanus and, . Chathamalus, c. Parasitism 3. Sparrow and any seed, p, Competition 4. Epiphyte on a mango, ; branch, Predation $. Orchid Ophrys and, bee, fa) Al, B-5,C-4, D-3, B2, (by A2,B-1,C-5, D4, E3, (¢) AS, B-2,C-1, D5, E-4, (dy At B-3, C-2, D-1, E-5, (e) AS, Bot, C-l, D2, E-3, (Kerala PMT), 2010, , 124. Which one of the following is most appropriately, defined?, , (a), {b), (©), , {d), , , , , , , , , , , , , , (a), (ch, , 127.The type of biotic interaction,, interacting species is benefitted while the 0, unaffected, is, , Host is an organism which provides food to another, organism., , Amensalism is @ relationship in which one species, is benefitted whereas the other is unaffected., Predator is an organism that catches and kills ather, , organism for food., Parasite is an organism which always lives inside, Mains), , the body of other organism and may kill it., (AIPM, , 125. An example of endomycorthiza is, , {a) Nostoc (b) Glomus, , (c) Agaricus (d) Rhizobium., y (AIPMT IMains), 126. Bamacles growing on the back of whale is a0 example, , of, , (a) mutualism (b) commensalism, , (c) parasitism (d) amensalism, , {c) predation. (Kerala PMT), , in which one of the, , ther remains, , ammensalism (b) commensalism, predation (d) parasitism., , 2009, , 128 An association between two individuals of populations, where both are benefitted and where neither can survive, without the other is, (a) commensalism (by amensalism™, (c)_ proto-caoperation (4) mutualism. (Amu), , 2008, , 129, What is a keystone species? ., , (a) Aspecies which makes up only @ small proportion, , of the total biomass of a community. yet has 4, , huge impact on the community's organisation and, survival., , {b) A common spec, , ies that has plenty of biomass,, yet has a fairly low impact on the, , community's, , {c) A rare species that has mini, biomass and on i, (@) A dominant species that con:, proportion of the biomass, other species., 130, Which of the following statements is incorrect?, (a) Lichen, an association of fungus and algac is an, example of mutualism., {b) Those epiphytes which use other plants for support, only and not for water or food supply and are, examples of | commensalism., (c) Sea-anemone on hermit-crab, , protocooperation., {d) Mutualism, protocooperation, commensalism, cannot be included under symbiosis. (AlIMS), , 131, When both partners‘components are affected negatively,, the nature of interaction is, (a) commensalism (b) predation, (c)_ competition (d) ammensalism. (AFMC), , 132, Ifthe stronger partner is benefitted and the weak partner, js damaged, it is known as, {a) predation {b) allelopathy, , (c) symbiosis (a) commensalism., (J&K CET), , 133. In the association between two organisms, if one, organism is benefitted and the other is neither benefitted, nor harmed, this relationship is known as, , is an example of, , (a) predation {b) mutualism, (c) commensalism (d) parasitism. (J & K CET), 2007, 134.4 high density of elephant population jn an area can, result in, , (a) intra specific competition, (b) inter specific competition, (c)_ predation on one another, {d) mutualism. (CBSE PMT)