- 1(current)
Q. No.Consider the two statements:
| Assertion (A): | Energy flow in ecosystem is bidirectional. |
| Reason (R): | Energy goes on increasing with each and every trophic level. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Energy Flow | Ecological Pyramids |
91%
Level 1: 80%+
Hints
Match List I with List II
Choose the correct answer from the options given below:
1. A-III , B-I, C-IV, D-II
2. A-II , B-I, C-IV, D-III
3. A-II , B-III, C-I, D-IV
4. A-III , B-II, C-IV, D-I
| List I | List II |
| A. Primary consumers | I. Top carnivore |
| B. Tertiary consumers | II. Herbivore |
| C. Producers | III. Carnivore |
| D. Secondary consumers | IV. Plants |
Choose the correct answer from the options given below:
1. A-III , B-I, C-IV, D-II
2. A-II , B-I, C-IV, D-III
3. A-II , B-III, C-I, D-IV
4. A-III , B-II, C-IV, D-I
Subtopic: Ecological Pyramids |
92%
Level 1: 80%+
Hints
Which of the following statements are correct with respect to ecological pyramids ?
Choose the correct answer from the options given below:
1. A, B, C only
2. A, C, D, E only
3. B, D only
4. A, B, E only
| A. | The base of each pyramid represents the producers or the first trophic level while the apex represents tertiary or top-level consumer |
| B. | The pyramid of energy is always upright |
| C. | A given species can occupy only one trophic level in the same ecosystem at the same time |
| D. | The pyramid of number in tree ecosystem is upright |
| E. | Saprophytes are not given any place in ecological pyramids |
1. A, B, C only
2. A, C, D, E only
3. B, D only
4. A, B, E only
Subtopic: Ecological Pyramids |
83%
Level 1: 80%+
Hints
Choose the correct statements
A. Length of the food chain is generally limited to 3-4 trophic levels due to energy loss.
B. Length of food chain depends upon the producer
C. In hydrarch succession, lichen is the pioneer community
D. Removal of most of the carnivores in an ecosystem results in an increased population of deer
E. Removal of 80% of top carnivores results in greatly increased growth of vegetation
Choose the correct answer from the options given below
1. A, B and C only
2. C, D and E only
3. A, D and E only
4. A, B and D only
A. Length of the food chain is generally limited to 3-4 trophic levels due to energy loss.
B. Length of food chain depends upon the producer
C. In hydrarch succession, lichen is the pioneer community
D. Removal of most of the carnivores in an ecosystem results in an increased population of deer
E. Removal of 80% of top carnivores results in greatly increased growth of vegetation
Choose the correct answer from the options given below
1. A, B and C only
2. C, D and E only
3. A, D and E only
4. A, B and D only
Subtopic: Energy Flow | Ecological Pyramids |
66%
Level 2: 60%+
Hints
Assertion(A): The biomass of fishes far exceeds that of phytoplankton in sea.
Reason(R): The pyramid of biomass in sea is generally inverted.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): The pyramid of biomass in sea is generally inverted.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Ecological Pyramids |
50%
Level 3: 35%-60%
Hints
Assertion(A): The pyramid of energy is always upright.
Reason(R): When energy flows from a particular trophic level to the next trophic level, some energy is always lost as heat at each step.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): When energy flows from a particular trophic level to the next trophic level, some energy is always lost as heat at each step.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Ecological Pyramids |
90%
Level 1: 80%+
Hints
- 1(current)
Q. No.
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