Consider the following statements concerning food chains.
$A.$ Removal of $80\%$ tigers from an area resulted in greatly increased growth of vegetation.
$B.$ Removal of most of the carnivores resulted in an increased population of deers.
$C.$ The length of food chains is generally limited to $3-4$ trophic levels due to energy loss.
$D.$ The length of food chains may vary from $2$ to $8$ trophic levels.
Which two of the above statements are correct?

  • A
    $A, D$
  • B
    $A, B$
  • C
    $B, C$
  • D
    $C, D$

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Similar Questions

Identify the stage of hydrarch succession shown in the figure.

Which of the following statements are correct?
$(a)$ Net primary productivity is available biomass for consumption to heterotrophs.
$(b)$ Secondary productivity is defined as the rate of formation of new organic matter by heterotrophs.
$(c)$ The annual net primary productivity of the ocean is greater than that of land.
$(d)$ Warm and moist environment favours decomposition.

Select the incorrect match.
$I.$ Sedimentary nutrient cycle-Nitrogen cycle
$II.$ Pioneer species-Lichens
$III.$ Secondary succession-Burned forests
$IV.$ Pyramid of biomass in sea-Upright

$A$ food chain consists of:

Select the incorrect statement from the following.

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