1
AIPMT 2008
MCQ (Single Correct Answer)
+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 ?
A
(iii), (iv)
B
(ii), (iii)
C
(i), (iv)
D
(i), (ii)
2
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Which one of the following ecosystem types has the highest annual net primary productivity ?
A
Temperate evergreen forest
B
Temperate deciduous forest
C
Tropical rain forest
D
Tropical deciduous forest
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Which one of the following is not used for construction of ecological pyramids ?
A
Rate of energy flow
B
Dry weight
C
Fresh weight
D
Number of individuals
4
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem ?
A
Net production (NP)
B
Secondary production
C
Tertiary production
D
Gross production (GP)
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