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Organisms and Populations Test - 67

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Organisms and Populations Test - 67
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  • Question 1
    1 / -0
    Relation between clownfish and sea anemone
    Solution
    • Mutualism is the cooperation between organisms in which both the organisms are benefitted from the activity of each other.
    • The clownfish dwells in the tentacles of the sea anemone.
    • The stinging tentacles protect the clownfish from its predator while the clownfish the algae and food leftovers and keep them clean.
    • So, the correct answer is 'Mutualism'.
  • Question 2
    1 / -0
    If the mean and the median pertaining to a certain character of a population are of the same value, the following is most likely to occur?
    Solution
    In statistics, a bimodal distribution is a continuous probability distribution with two different modes. These appear as distinct peaks in the probability density functions. If the distribution is symmetric then the mean is equal to the median and the distribution will have zero skewness. Since bimodal distribution is symmetric both mean and mode fall in the center but it has two modes.
    So the correct answer is option A "bimodal distribution".
  • Question 3
    1 / -0
    Logistic growth occurs when there is
    Solution
    Logistic growth occurs when the population size increases with time but levels off after reaching a maximum which is known as the carrying capacity. Carrying capacity is fixed and is the maximum number of individuals that can be supported by a population. So, the correct option is 'a fixed carrying capacity'.
  • Question 4
    1 / -0
    The equation represents.

    $${N_t} = {N_0}\exp \left( {rt} \right) = {N_0}{e^{rt}}$$
    Solution
    Ideally, when resources in the habitat are unlimited, each species has the ability to realise fully its innate potential to grow in number, as Darwin observed while developing his theory of natural selection. Then the population grows in an exponential or geometric fashion.
    The integral form of the exponential growth can be represented by equation as
    N$$_t$$ = N$$_0$$e$$^{r}$$$$^{t}$$
    where 
    N$$_t$$ = Population density after time t
    N$$_0$$ = Population density at time zero
    r = intrinsic rate of natural increase
    e = the base of natural logarithms.
    So, the correct option is 'Integral form of exponential growth'.
  • Question 5
    1 / -0
    The interaction between the two organism in which one organism kills and feed on the second organism is called
    Solution
    Scavenging is the mode of nutrition in which organisms feed on dead organisms. In predation one organism (the predator) kills and feeds on the other organism (the prey). In parasitism, one organism feeds on the other organism without killing the other organism. Mutualism is a mode of nutrition in which both organisms are benefited. 
    So, the correct option is 'Predation'.
  • Question 6
    1 / -0
    Forest ecosystem in india is the following 
  • Question 7
    1 / -0
    During $$2010-2012$$ a square jungle having $$5$$k length has $$5000$$ bamboos. So what will be the population density of it?
  • Question 8
    1 / -0
    How many statements are incorrect from following?

    (A) Loranthus is a partial stem parasite
    (B) Arceuthobium is a smallest angiospermic parasite
    (C) Bauhinia and Tinospors are example of Lianas
    (D) Sea anemose and hermit crab shows amensalism 
    Solution
    $$\rightarrow$$ Loranthus is a partial stem parasite as it depends on host plant for the shelter and water.

    $$\rightarrow $$ Arceuthobium, a total stem parasite, is the smallest parasitic angiosperm.
    It is commonly called dwarf mistletoes, Belongs to the family of pinacess

    $$\rightarrow $$ Woody perennial climbers found in tropical rain forests are lianas. they twine themselves around tall trees to secure sunlight e.g. Hiptage, Bautinia etc.

    $$\rightarrow $$ Sea anemones and Hermit crabs shows "commensalism not amensalism". It's a stable connection that side steps the typical prey and predator relationship found in nature.

    $$\therefore 1$$ statement i.e. , (4) is false.
  • Question 9
    1 / -0
    The interaction between ruminants and the bacteria in their intestine is _________.
    Solution
    The Interaction between the ruminants and the bacteria in their intestine is mutualism or symbiotic one, as the cow provides the Bacteria a warm, moist environment with a constant supply of food. In return the Bacteria enable the cow to access the nutrients in their cellulose rich diet and provide a protein source.
  • Question 10
    1 / -0
    The parasitism in which the host and parasite belong to the same genus or family is
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