OBJECTIVE FOR ECOSYSTEM
Multiple Choice Questions (MCQs)
- The maximum percentage of energy changed into food is:
(a) 10% (b) 20 (c) 30 (d) 5
- Percentage of energy absorbed in atmosphere is:
(a) 50 (b) 60 (c) 57 (d) 70
- Which of the following is not tertiary consumer?
(a) Hawk (b) Lion (c) Snake (d) Tiger
- Which of the followings is secondary consumer?
(a) Hawk (b) Lion (c) Snake (d) Tiger
- Which of the followings is not abiotic component?
(a) Soil (b) Fire (c) Plant (d) Water
- Amount of nitrogen present in the atmosphere is:
(a) 34% (b) 78% (c) 75% (d) 85%
- The bacteria involved in asymbiotic nitrogen fixation are:
(a) Clostridium (b) Rhizobium (c) Nitromonas (d) None
- The bacteria involved in symbiotic nitrogen fixation are:
(a) Clostridium (b) Rhizobium (c) Nitromonas (d) None
- The bacteria involved in denitrification are:
(a) Pseudomonas (b) Rhizobium (c) Nitromonas (d) Clostridium
- The percentage of water on surface of the earth in the form
of lakes, rivers, oceans is:
(a)65 (b) 56 (c) 79 (d) 73
Ans
- (d) 2. (c) 3. (c) 4. (c) 5. (c) 6. (b) 7. (a) 8. (b) 9. (a)
10. (d)
Fill In blanks
- microorganisms which decompose the bodies of dead animals and plants are called _________.
- Some floating microscopic photosynthetic organisms are also present. They are called _______.
- The rate at which food is manufactured by the producers in unit area and in unit time is called________.
- The sequence of organisms through which energy moves in anecosystem is called_______ chain.
- The combination of different food chains is called food_______ .
- The representations of flow of energy through an ecosystem in the form of pyramids are called ecological ______.
- The pyramid which shows the relationship between the number of producers, herbivores and carnivores at successive trophic levels is called____ of numbers.
- The pyramid which shows the relationship between the energy successive trophic levels is called pyramid of_______.
- The cyclic exchange of different chemical elements between the living and non-living component of the ___________ is called
biogeochemical cycle.
- Ans:
1. decomposes 2. phytoplanktons 3. productivity 4. food
5. web 6. pyramids 7. pyramid 8. energy
9. biosphere
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