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Organisms and Populations Test - 19

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Organisms and Populations Test - 19
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  • Question 1
    1 / -0
    A form of symbiosis in which both participants benefit is
    Solution
    Mutualism is the way two organisms of different species exist in a relationship in which each individual fitness benefits from the activity of the other.
    So, the correct option is 'mutualism'
  • Question 2
    1 / -0
    Causes for increased population growth in India is/are.
    Solution
    Lack of education in India is the major cause of population growth. People indulge in unprotected sexual intercourse in rural areas. With minimal laws about the same the population increases.
    The medicinal provision protects the various individuals and has decreased the death rate.
    So, the correct option is 'All of these'.
  • Question 3
    1 / -0
    Which of the following statement is correct?
    Solution
    The number of organisms always decrease once a population reaches its carrying capacity  but if they are given suitable environment they increase in number. Population does not experience exponential growth once they reach carrying capacity.
    Population does not grow rapidly  when it reaches its carrying capacity.
    But limiting factors can influence the number of organisms in a population once it reaches its carrying capacity.
    So, the correct option is 'Limiting factors can influence the number of organisms in a population once it reaches its carrying capacity'
  • Question 4
    1 / -0
    Certain millipedes and silver fish live in nest of army ant feeding on their refuse. The relationship is
    Solution
    A. Commensalism is the relationship between two different organisms in which one is always benefitted and the other is neither benefitted nor harmed.
    B. Mutualism is the relationship between two or more individuals in which all are benefitted by each other.
    C. Protocooperation is the relationship between two species which is beneficial and favourable to both but not obligatory to both.
    D. Scavenging is the dependence upon dead and decay matter for food.
    Millipedes and silver fish live in the nest of army arm feeding on their refuse, shows commensalism as millipedes and silver fish are getting benefit while army ant is neither benefitted nor harmed.
    So, the correct answer is 'Commensalism'.
  • Question 5
    1 / -0
    One of the following pair of animals is an example of commensalism
    Solution
    Commensalism is a long-term biological interaction in which members of one species gain benefits while those of the other species neither benefit nor are harmed. The jackal relies on the tiger for food. The tiger remains unaffected by the Jackal. Since it is a much larger predator, it kills larger prey. So the golden jackal follows behind the tiger and eats the leftovers from their kill. They Interact in the northern part of Africa and southern Asia.

    So, the correct answer is 'Golden Jackal-Tiger'.
  • Question 6
    1 / -0
    A form of symbiosis in which one participant benefits and the other apparently is not benefited or harmed is:
    Solution
    A form of symbiosis in which one participant benefits and the other apparently is not benefited or harmed is commensalism. So, the correct option is  'commensalism'
  • Question 7
    1 / -0
    When both partners/components are affected negatively, the nature of interaction is
    Solution
    When both partners/components are affected negatively, the nature of the interaction is competition. Competition is an interaction between organisms or species in which the fitness of one is lowered by the presence of another. The limited supply of at least one resource (such as food, water, and territory) used by both can be a factor.
    Predation is a biological interaction where a predator (an organism that is hunting) feeds on its prey (the organism that is attacked).
    Amensalism is any relationship between organisms of different species in which one organism is inhibited or destroyed while the other organism remains unaffected.
     In commensalism, one organism benefits from the relationship while the other species involved neither benefits nor is harmed.
    So, the correct answer is option C.
  • Question 8
    1 / -0
    Parasites that are capable of living without a host are called 
    Solution
    • Facultative means false and obligate means true. So, those parasites which cannot survive without their host are called obligate parasites, whereas, those parasites which can survive without a host are called facultative parasites.
    • Green plants in genera such as Rhinanthus and Colpoon can grow independently of any host, but they also act opportunistically as facultative root parasites of neighboring green plants.

    So, the correct answer is option A.
  • Question 9
    1 / -0
    A relationship in which a sea anemone attached to shell of the hermit crab is called
    Solution
    • The terms are given here describe the interaction between organisms in nature. When both the species benefit, the interaction is called mutualism.
    • One species is harmed whereas the other is unaffected is called amensalism.
    • Protocooperation is a positive interaction beneficial for both the interacting organisms but is not an obligatory interaction and both species can lead their independent lives without an intimate interaction.
    • The interaction where one species is benefited and the other is neither benefited nor harmed is called commensalism. The relationship between the sea anemone and hermit crab is commensalism in which the hermit crab is protected from its predators.
    • Therefore, the correct answer is option D.
  • Question 10
    1 / -0
    Exponential growth occurs in
    Solution
    answer:
    Correct Answer: D
    Explanation:

    • Exponential growth occurs when the increase in the population becomes rapid and soon attains its full potential rate due to constant requirements (with respect to the availability of food and other requirements). 
    • Exponential growth occurs in bacteria, yeast as well as in Amoeba.
    So, the correct answer is 'All of the above'.
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