901. Physical space occupied by an organism (and also its functional role in a community) is called:
A. Niche
B. Microhabitat
C. Macrohabitat
D. Habitat
902. Animals: Cockroaches, scorpions, ants, lizards, mice: which share their abode are called:
A. Opportunists
B. Inquilines
C. Domestic ants
D. Households
903. Generally succession leads to a climax community composed of:
A. Grasses
B. Shrubs
C. Herbaceous flora
D. Trees
904. The effect of interspecific competition on niches is to make them:
A. smaller
B. larger
C. change location
D. more triangular
905. The most effective defenses of plants against the herbivores are:
A. Morphological B. Temporal
C. Chemical D. Developmental
906. When an organism is benefitted without affecting the other the relationship is termed:
A. predation
B. parasitism
C. commensalism
D. symbiosis
907. A flowering plant and the animal that pollinates it are examples of:
A. Parasitism
B. Mutualism
C. Interspecific competition
D. Commensalism
908. Animals which can tolerate only a narrow range of salinity are said to be:
A. Euryhaline
B. Stenohaline
C. Catadromous
D. Anadromous
909. Antagonistic interaction includes:
A. Scavenging
B. Competition
C. Amensalism
D. Both (B) and (C)
910. The most successful parasite is the one that:
A. has a life cycle involving only one host
B. is permanently attached to the host
C. is highly specialized
D. makes minimum demands on the host
911. Lichens are described as indicators of:
A. Air pollution
B. Water pollution
C. Xerophytic succession
D. Mesophytic succession
912. In commensalism:
A. One of the partners is benefitted at the cost of the second partner
B. Both the partners are reciprocally benefitted
C. One partner is benefitted and the other one is not at loss
D. No partner is benefitted by the association
913. Lichens do not normally grow in cities:
A. Because of absence of the right type of algae and fungi
B. Because of lack of moisture
C. Because of air pollution
D. Because natural habitat is missing
914. Primary productivity of ecosystem refers to:
A. increase in primary consumers
B. net production of primary producers
C. CO2 fixation of organic carbon
D. increase in mortality of primary producers
915. The individuals in the uppermost ring pyramid represent the one with:
A. maximum number
B. maximum biomass
C. the ultimate consumer in the chain
D. minimum biomass
916. Which of the following is a temporary parasite?
A. Glochidium larva
B. Tapeworm
C. Entamoeba histolytica
D. Entamoeba gingivalis
917. An association of a small fish (Fierasfer inhabiting in the cloaca of sea cucumber is an example of:
A. amensalism
B. parasitism
C. mutualism
D. commensalism
918. The animals which preys the other living species is known as:
A. predator
B. cannibalistic
C. primary consumer
D. parasite
919. An association of different interrelated populations belonging to different species in common environment which can survive in nature is called:
A. Biotic community
B. Population
C. Herd
D. Family
920. A direct food relation between two species of animals in which one animal kills and feed on another is referred to as:
A. Predation
B. Parasitism
C. Symbiosis
D. Scavenging
921. An association of two species where one is benefitted and other remains unaffected or unharmed, it is called:
A. Symbiosis
B. Parasitism
C. Predation
D. Commensalism
922. An association of two species of organisms in which both the partners derive benefit from each other is called:
A. Mutualism
B. Commensalism
C. Competition
D. Parasitism
923. An association between a sea anemone Adamsia, and a hermit crab living in a gastropod shell is:
A. Protocooperation
B. Commensalism
C. Mutualism
D. Amensalism
924. The ecological niche of an organism denotes:
A. habitat of the organism
B. on whom the organism feeds
C. the status of an organism within a particular community
D. All of the above
925. The transition zone where two different types of communities meet is called:
A. ecotype
B. ecoline
C. ecotone .
D. ecosystem
926. Mimicry is a device for:
A. concealing from predator
B. concealing from prey C both (A) and (B)
D. becoming conspicuous
927. Generally the time taken for a secondary succession to reach climax stage is:
A. 50-100 yrs. B. 150-200 yrs.
C. 250-300 yrs. D. 350-400 yrs.
928. The philosophy behind the existence of a community is:
A. Interaction
B. Co-existence
C. Helotism
D. Dominance by some
929. The sum of the population of the same kind constitutes a:
A. Species
B. Genus
C. Colony
D. Community
930. What could be the meeting point of biological and ecological hierarchies?
A. Organism
B. Population
C. Family
D. Genus
931. Plants which are attached to stones and rocks:
A. Aerophytes
B. Psammophytes
C. Halophytes
D. Lithophytes
932. A community is:
A. Autotrophs and heterotrophs
B. Collection of plants and animals
C. Organisms living in a habitat
D. Web of life
933. Plants growing well in hill crevices are:
A. Lithophytes
B. Ermophytes
C. Chasmophytes
D. Psammophytes
934. One of the following relationships is useful to one organism and of no significance to other:
A. Commensalism
B. Parasitism
C. Mutualism
D. Amensalism
935. Which of the following is a negative interaction between the populations?
A. Symbiosis
B. Mutualism
C. Parasitism
D. Commensalism
936. An ecological community is an assemblage of:
A. Food webs
B. Food chains
C. Closely related species
D. Interacting population
937. The conversion of a lake to a terrestrial community is a form of:
A. Primary succession
B. Secondary succession
C. Late secondary succession
D. None of the above
938. Growth of Tagetes frees the soil of:
A. Most nematodes
B. Most weeds
C. Most pathogens
D. Fungal pathogens
939. Relationship between water-fern Azolla and nitrogen fixing cyanobacterium Anabaena is:
A. Parasitic
B. Symbiotic
C. Predation
D. Competition
940. Gause's hypothesis/principle is related to:
A. Principle of competitive exclusion
B. Niche specialisation
C. Inter-specific competition
D. All of the above
941. The relationship between one species and another within a community that has evolved through interactions is based upon:
A. Requirement and mode of obtaining food only
B. Requirement and mode of obtaining shelter only
C. On the habits of the species only
D. All of the above
942. Antelopes are:
A. Fungivorous
B. Herbivores
C. Carnivorous
D. None of the above
943. The kind of climax community in an area depends mostly on:
A. food of available colonist
B. soil organisms G climate
D. bed rock
944. Information of birth rate, death rate, ex ratio, age distribution of population can be got from:
A. Nasality table
B. Mortality table
C. Age distribution table
D. Life table
945. In a population where competition between individuals is severe than the distribution is said to be:
A. Random
B. Uniform
C. Regular
D. Non-random
946. Generally succession leads to a climax community composed of:
A. Grasses
B. Shrubs
C. Herbaceous
D. Trees flora
947. Female anopheles mosquitoes sucking human blood at intervals are:
A. Permanent parasite
B. Endoparasites
C. Intermittent parasites
D. Hemiparasites
948. Organisms sharing a common environment belong to same:
A. Community
B. Genus
C. Species
D. Population
949. A prey population can weaken the search image of its predator by being:
A. polymorphic
B. conspicuous
C. in a clumped pattern of dispersion
D. all the same size and colour
950. The effect of interspecific competition on niches is making them:
A. smaller
B. larger
C. change location
D. more triangular
Answers:
901 | 902 | 903 | 904 | 905 | 906 | 907 | 908 | 909 | 910 |
A | B | D | A | A | C | B | B | D | D |
911 | 912 | 913 | 914 | 915 | 916 | 917 | 918 | 919 | 920 |
A | C | C | C | C | A | D | A | A | A |
921 | 922 | 923 | 924 | 925 | 926 | 927 | 928 | 929 | 930 |
D | A | B | C | C | C | A | A | A | A |
931 | 932 | 933 | 934 | 935 | 936 | 937 | 938 | 939 | 940 |
D | C | C | A | C | D | A | A | B | D |
941 | 942 | 943 | 944 | 945 | 946 | 947 | 948 | 949 | 950 |
D | B | C | D | A | D | C | A | C | A |
49 most important questions on Science (Objective type):
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