- 1(current)
Q. No.Assertion: In a food chain, members of successive higher levels are fewer in number.
Reason: Number of organisms at any trophic level depends upon the availability of organisms which serve as food at the lower level.
1. Both Assertion & Reason are true and Reason is the correct explanation of Assertion
2. Both Assertion & Reason are true but Reason is not the correct explanation of Assertion
3. Assertion is true statement but Reason is false.
4. Both Assertion and Reason are false statements.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
R: Energy goes on increasing with each and every trophic level.
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
| Column-I | Column-II | ||
| A. | Tansley | (i) | Gave the term ecology |
| B. | Ramdeo Mishra | (ii) | Father of ecology |
| C. | Reiter | (iii) | Correctly defined ecology |
| D. | Ernst Haeckel | (iv) | Gave the term ecosystem |
1. A = (i), B = (ii), C = (iii), D = (iv)
2. A = (iv), B = (ii), C = (i), D = (iii)
3. A = (ii), B = (i), C = (iv), D = (iii)
4. A = (iv), B = (ii), C = (iii), D = (i)
Consider the following four statements (a-d) and select the correct option stating which ones are true (T) or false (F)
| a. | Organisms at each trophic level depends on those at higher trophic level for their energy demands. |
| b. | Each trophic level has a certain mass of living material at a particular time called standing crop. |
| c. | Each trophic level has a certain mass of non-living material at a particular time called standing state. |
| d. | The number of trophic levels in a grazing food chain is not restricted. |
Options
| a | b | c | d | |
| 1. | T | T | F | F |
| 2. | F | T | F | T |
| 3. | T | F | T | F |
| 4. | F | T | T | F |
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 two of the above statements are
correct?
1. i and ii
2. ii and iii
3. iii and iv
4. i and iv
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 two of the above statements are correct?
1. i and ii
2. ii and iii
3. iii and iv
4. i and iv
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
| Statement I: | The pyramid of energy is always upright, can never be inverted |
| Statement II: | When energy flows from one trophic level to next trophic level, some energy is always lost as heat |
In light of the above statements, choose the most appropriate answer from the options given below
1. Both statement I and statement II are correct
2. Both statement I and statement II are incorrect
3. Statement I is correct but statement II is incorrect
4. Statement I is incorrect but statement II is correct
Statement I: Energy flow is greatly reduced at each successive trophic level from producers to herbivores and then carnivores.
Statement II: The pyramid of energy is both top right and inverted.
In light of the above statements, choose the most appropriate answer from the options given below.
1. Both statement I and statement II are true
2. Both statement I and statement II are false
3. Statement I is correct but statement II is false
4. Statement I is incorrect but statement II is true
Reason(R): All animals depend on plants directly for their food needs.
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.
- 1(current)
Q. No.
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