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Organisms and Populations Test - 66

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Organisms and Populations Test - 66
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following represents largest man made ecosystem?
    Solution
    Man-made ecosystems are the copy of natural ecosystems created by man. The conditions of natural ecosystems are replicated in the man-made ecosystem. These are sustained by human interventions. The examples include aquarium, zoo, botanical gardens, park. Out of these, zoo represents the largest man-made ecosystem.
    Thus, the correct answer is 'Zoo.'
  • Question 2
    1 / -0
    Which of the following which is the smallest parasite?
    Solution
    Wolffia is the smallest flower. Arceuthobium is the smallest angiosperm parasite. Lemna is the smallest angiosperm plant. Spirodela has the smallest genome size.
    Thus, the correct answer is 'Arceuthobium.'
  • Question 3
    1 / -0
    Association of sea anemone and hermit crab is an example of?
    Solution
    • In ecology, commensalism is a relationship between two species of organisms in which one species benefit from the relationship and the other species is unaffected by it.
    • For example - A secondary sea anemone gets attached to the shell covering of the hermit crab. The hermit crab gains protection from predators by its relationship with the sea anemone. 
    • Parasitism is an association of two organisms of different sizes and species in which the smaller one is benefited and the large one is harmed. 
    • Predation is the interaction between two species, one of which captures, kills and eats up the other.
    • Mutualism confers benefits on both the interacting species.

    So, the correct answer is option C.
  • Question 4
    1 / -0
    A close mutualistic association between flower and pollinating agent is found in 
  • Question 5
    1 / -0
    Within the exponential phase of growth, if the initial surface area and growth rate of leaf is
    $${ 10mm }^{ 2 }$$ and $$0.015 mm^2$$ hour respectively,the area of the leaf after 4 days would range from
    Solution
    Growth rate =0.015mm^2 per hour.
    The number of hours in 4 days=96 hours.
    Hence, total growth in the area after 4 days will be=0.015*96==1.44mm^2
    Therefore, the area of the leaf after 4 days=(10+1.44)mm^2=11.44mm^2

    So, the correct answer is '10 to 12mm^2'.

  • Question 6
    1 / -0
    What kind of interaction, species A and B are showing:-

    Solution
    In the first graph, both species A and B when lived together have almost the same growth and that too in an increasing manner while in the second graph, when both species got separated their growth declines. So this is the case of mutualism. Mutualism is a relationship between two or more individuals of different species in which all are benefitted by one another.
    Proto-cooperation is the relationship between two species, which is favorable but not obligatory to both.
    Parasitism is an interaction between two individuals, where the parasite gets the benefit at the expense of the host.
    Predation is basically eating of one species by another means one species gets eliminated by another but here in both graphs either their growth increases simultaneously or gets reduced. 

    So the correct option is "Mutualism".
  • Question 7
    1 / -0
    How many of the following shows $$"+ -"$$ interaction?
    a. Fig and wasp
    b. Convolvulus and wheat
    c. Sparrow and seeds
    d. Tiger and deer
    e. Epiphytes on mango tree
    f. Plasmodium and human.
    Solution
     '+-' reaction is called Predation and it occurs between predator and prey where one feeds on other . 
    So, the correct option  is '2'.
  • Question 8
    1 / -0
    Which kind of interaction, species A is showing with species B, C and D:-

    Solution
    Mutualism is the kind of interspecific interaction in which two or more organisms that live together and are dependent on each other. These organisms provide mutual benefits to each other. Hence, in this interspecific interaction, both the organisms benefit and it is often depicted as a (+/+) relationship or interaction.
    So, the correct answer is 'Mutualism'.
  • Question 9
    1 / -0
    Insect population grows very fast in Rainy season and they disappear in the summer season. Which kind of interaction is responsible for controlling their population size:-
    Solution
    The high temperature and humidity of the rainy season provide insects with an adequate environment for breeding. Hence, their numbers increase rapidly during this season. However, during summers, as the aestivation period ends, different species of insects come out and a decrease in the insect populations is observed. This decrease could be attributed to the increase in interspecific predation amongst the species.
    So, the correct answer is 'Interspecific predation'.
  • Question 10
    1 / -0
    A group of similar ecosystems with the same general type of physical environment is called a ____
    Solution
    • A biome is a large geographical area characterized by certain types of plants and animals. A biome is defined by the complex interactions of plants and animals with the climate, geology, soil types, water resources, and latitude of an area.
    • One example of a biome is a desert. Deserts are the world's driest regions. Most of the vegetation there takes the form of drought-resistant plants such as cacti, which store water in their stems and have waxy coverings, and scrubby plants like the creosote bush, that have extensive root system.
    So, the correct option is 'Biome'.
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