Home
Class 12
BIOLOGY
Assertion: Ecological pyramids cannot ex...

Assertion: Ecological pyramids cannot explain all vital functions of any ecosystem.
Reason: Pyramids actually do not explain the role of organisms working at more than one trophic level.

A

If both Assertion &Reason are true and the reason is the corect explanation of the assertion , then mark (1)

B

If both Assertion & Reason are true but the reason, is not the correct explanation of the assertion , then mark (2)

C

If Assertion is true statement but Reason is false , them mark (3).

D

If both Asseration and Reason are false statements , then mark (4).

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ECOSYSTEM

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section C)|66 Videos

  • DIGESTION AND ABSORPTION

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (SECTION-D Assertion - Reason Type Questions )|10 Videos

  • ENVIRONMENTAL ISSUES

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION D|15 Videos

Similar Questions

Explore conceptually related problems

Name any two organisms which can occupy more than one trophic level in an ecosystem.

Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?

Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?

Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?

Assertion: Decomposition is one of the most vital functional attribute of ecosystem. Reason: It helps in breakdown of organic complex matter and loosening of soil as well.

Assertion : Monographs are useful in providing information for identification of names of all genera only. Reason : Monographs contain information of more than one taxon.

Assertion: The loss of biologically useful energy as heat with every energy transfer in a food chain is a consequence of the second law of thermodynamics. Reason: Energy does not remain trapped permanetly in any organism. It is either passed on to higher trophic level or becomes available to detritivores and decomposers after the organism dies.

Which of these is/are limitation/s of ecological pyramids? I. Decomposers are not given any place in ecological pyramids. II. Ecological pyramids do not accommodate a food web. III. Ecological pyramids may be upright or inverted. IV. They don't consider ominvores in two different trophic levels.

Study the following statements and select the incorrect ones. (i) Pyramids of energy and yearly biomass production can never be inverted, since this would violate the laws of thermodynamics. (ii) Pyramids of standing crop and numbers can be inverted, since the number of organisms at a time does not indicate the amount of energy flowing through the system. (iii) There are certain limitations of ecological pyramids such as they do not take into account the same species belonging to two or more trophic levels. (iv) Saprohytes are not given any place in ecological pyramids even though they play a vital role in the ecosystem.

Consider the following statements and select the correct option stating which ones are true (T) and which ones are false (F). (i) Pyramid of biomass is upright in the forest ecosystem and inverted in the grassland ecosystem. (ii) Pyramid of numbers is inverted in grassland and upright in aquatic ecosystem. (iii)Pyramid of energy depicts the rate of energy flow or productivity at successive trophic levels . (iv) Ecological pyramids have no place for detritivores and decomposers though they play an important role in an ecosystem.