Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Ecosystem question

2008 · Q49
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Biology
  4. /Ecosystem
  5. /2008 · Q49

Ecosystem question

2008 · Q49

NEETBiologyEcosystemMCQ+4 / −1
Consider the following statements concerning food chains:
(i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation
(ii) Removal of most of the carnivores resulted in an increased population of deers
(iii) The length of food chains is generally limited to 3-4 trophic levels due to energy loss
(iv) The length of food chains may vary from 2 to 8 trophic levels
Which of two of the above statements are correct ?
  1. A
    (iii), (iv)
  2. B
    (ii), (iii)
  3. C
    (i), (iv)
  4. D
    (i), (ii)
View written solutionFree

Correct answer: B

Removal of 80% tigers (i.e., tertiary consumer) from an area resulted in decreased growth of vegetation because there will be increased numbers of primary consumers which feeds on green plant. Removal of most of the carnivores resulted in an increased population of deers on which carnivores depends. The length of food chain is generally limited to 3-4 trophic level due to energy loss because all the food available at one level is neither eaten nor used by animals at the next level and a lot of the energy is lost in respiration to drive the organisms metabolism so less energy is left to support higher trophic level.

PreviousNext

More from Ecosystem

  • The slow rate of decomposition of fallen logs in nature is due to their:2008 · MCQ
  • Which one of the following ecosystem types has the highest annual net primary productivity ?2007 · MCQ
  • Which one of the following is not used for construction of ecological pyramids ?2006 · MCQ
  • Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem ?2004 · MCQ
  • An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be having -2004 · MCQ
  • Which of the following plants are used as green manure in crop fields and in sandy soils ?2003 · MCQ
  • Bamboo plant is growing in a far forest then what will be the trophic level of it ?2002 · MCQ
  • Plant Decomposers are : -2001 · MCQ