Home
Class 12
BIOLOGY
Consider the following statements. A...

Consider the following statements.
A. The movement of energy is unidirectional from the higher trophic level towards the lower trophic level.
B. Detritivores break down detritus into smaller particles bya a process is called fragmentation.
C. Humification and mineralisation occur during decomposition in the soil.
D. Decomposition is largely an oxygen-releasing process.
Of the above statements:

A

B and D are correct

B

A and B are correct

C

A and D are correct

D

B and C are correct

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ECOSYSTEM

    GRB PUBLICATION|Exercise EXEMPLAR PROBLEMS|41 Videos

  • CHROMOSOMAL BASIS OF INHERITANCE

    GRB PUBLICATION|Exercise Chromosome mapping|221 Videos

  • ENVIRONMENTAL ISSUES

    GRB PUBLICATION|Exercise Assertion & Reason Type Questions|30 Videos

Similar Questions

Explore conceptually related problems

Consider the following statements In an ecosystem energy (i) Movement is unidirectional (ii) Is lost irretrievably (iii) Movement is non-cyclic (iv) Movement is from higher to lower trophic levels Of these statements

Read the following statements carefully : ( i ) primary succession is a very slow process taking thousands of years for the climax to be reached. (ii) The energy at a higher trophic level is always more than at a lower level (iii) Bacterial and fungal enzymes degrade detritus into simple inorganic substances. This process is called fragmentation . (iv ) All succession, whether taking place in water or on land, proceeds to a similar climax community : the mesic condition . Which of the two above statements are correct ?

Fragmentation, leaching and catabolism are some of the important steps of decomposition. Study the following statements I , ii and iii regarding these and select the correct option. (i) Detritivores (e.g., earthworm) breakdown detritus into smaller particles. (ii) Water soluble inorganic nutrients go down into soil horizon and get precipitated as unavailable salts. (iii) Decomposers (e.g., bacteria and fungi) secrete digestive enzymes and degrade detritus into simpler inorganic substances.

Consider the following statements (A-D) and select the option which correctly fills the blacks. A. A group of species belonging to a trophic level that exploits a common resources base in a similar fashion is known as (i). B. (ii) reduces decomposition and causes the Pilling up of detritus. C. In oceans, productivity is limited by (iii) and (iv). D. The largest reservoir of calcium is (v).

Read the following statements and find out the incorrect statements. a. Predation is nature's way of transfering to higher trophic levels the energy fixed by plants b. Prey keep predator population under control c. Biological control methods adopted in agricultural pest control are base on thte abilty of the prey to regulate the predator population d. Predators help in maintaining species diversity in a community by inducing the intensity of competition among competing prey species

How many of the following statements are incorrect ? (i) Decomposition is largely an anaerobic process . (ii) Fragmentation , leaching , and catabolism occur simultaneously on detritus. (iii) The vertical distribution of different species occupying different levels is called stratification . (iv) The pond is a deep water body . (v) The rate of decomposition is controlled by the chemical composition of detritus and climatic factors.

Which of the following statement(s) are incorrect:- ltbr (A) A given species may occupy more than one trophic level in the same ecosystem (B) Pyramid of energy is always upright (C) Succession and evolution would have been antiparallel process (D) Primary succession is faster than secondary succession

GRB PUBLICATION-ECOSYSTEM -EXEMPLAR PROBLEMS
  1. The second trophic level of longer food chains in a lake is:

    Text Solution

    |

  2. Secondary producers are:

    Text Solution

    |

  3. Percentage of photosynthetically active radiation (PAR) in the inciden...

    Text Solution

    |

  4. Plants are called as because they fix carbon dioxide.

    Text Solution

    |

  5. In an ecosystem dominated by trees, the pyramid (of numbers) istype.

    Text Solution

    |

  6. In aquatic ecosystem, the limiting factor for the productivity is:

    Text Solution

    |

  7. Common detritivores in our ecosystem are:

    Text Solution

    |

  8. The major reservoir of carbon on Earth is:

    Text Solution

    |

  9. Consider the following statement with respect to ecosystems: A. Tw...

    Text Solution

    |

  10. Which kind of ecological pyramid is represented by the figure given be...

    Text Solution

    |

  11. Which kind of exological pyramid is represented by the figure given be...

    Text Solution

    |

  12. Which one of the following statements is incorrect?

    Text Solution

    |

  13. Which kind of ecological pyramid is represented by the figure given be...

    Text Solution

    |

  14. Diagrammatic representation of trophic levels in an ecosystem is given...

    Text Solution

    |

  15. The given ecological pyramid best represents:

    Text Solution

    |

  16. Which one of the following statements about productivity is wrong?

    Text Solution

    |

  17. Identify the likely organisms (1), (2), (3) and (4) in the food web s...

    Text Solution

    |

  18. Consider the following statements. A. The movement of energy is un...

    Text Solution

    |

  19. Diagrammatic representation first four stages of primary succession is...

    Text Solution

    |

  20. Which of the following statement/s regarding ecological pyramid is/are...

    Text Solution

    |