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Which of the following statements is not correct regarding biomagnification?
(i) Mercury accumulated by an organism cannot be metabolised.
(ii) In the process of biomagnification, concentration of DDT is increased at successive trophic levels.
(iii) Accumulation of cadmium can cause thinning of egg shell in birds.
(iv) DDT accumulation is a major cause of reduced population of fish eating birds.
(v) Biomagnification occurs only in aquatic food chain.
  • a)
    (i), (iii) and (v)
  • b)
    (iii) and (iv)
  • c)
    (iii) and (v)
  • d)
    (i), (ii) and (iv)
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Which of the following statements is not correct regarding biomagnific...
The higher amounts of pesticide like DDT, disturb calcium metabolism of birds resulting in thinning of egg shells and their premature breaking. This is a major cause of reduction of population of fish eating birds. Biomagnification is found in all types of food chains.
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Most Upvoted Answer
Which of the following statements is not correct regarding biomagnific...
The correct answer is option 'C' - (iii) and (v) are not correct statements regarding biomagnification. Let's discuss each statement in detail:

(i) Mercury accumulated by an organism cannot be metabolized:
- This statement is correct. Mercury is a toxic heavy metal that can accumulate in living organisms, mainly through the consumption of contaminated food. Once it enters the body, it can be converted into a more toxic form called methylmercury, which cannot be easily metabolized or excreted by organisms.

(ii) In the process of biomagnification, concentration of DDT is increased at successive trophic levels:
- This statement is correct. Biomagnification refers to the increase in the concentration of certain substances, such as DDT (a pesticide), as it moves up the food chain. DDT is not easily broken down or metabolized by organisms, so it tends to accumulate in the tissues of organisms at higher trophic levels.

(iii) Accumulation of cadmium can cause thinning of eggshell in birds:
- This statement is incorrect. The accumulation of certain substances, such as DDT and mercury, can indeed have adverse effects on organisms, but cadmium is not known to cause thinning of eggshells in birds. The thinning of eggshells is primarily associated with the pesticide DDT, which interferes with calcium metabolism in birds, leading to weakened eggshells.

(iv) DDT accumulation is a major cause of reduced population of fish-eating birds:
- This statement is correct. DDT is a persistent pesticide that accumulates in the environment and in the bodies of organisms. It has been widely implicated in the decline of fish-eating bird populations, such as the bald eagle and peregrine falcon. DDT can cause reproductive issues, including thinning of eggshells and decreased hatching success, leading to reduced population sizes.

(v) Biomagnification occurs only in aquatic food chains:
- This statement is incorrect. Biomagnification can occur in both aquatic and terrestrial food chains. It refers to the increase in the concentration of certain substances as they pass through different trophic levels. While aquatic ecosystems are often used as examples because they are well-studied, biomagnification can also occur in terrestrial ecosystems.

In conclusion, the incorrect statements regarding biomagnification are (iii) and (v). The correct answer is option 'C'.
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Read the passage given below and answer the following questions:The rate of a reaction, which may also be called its velocity or speed, can be defined with relation to the concentration of any of the reacting substances, or to that of any product of the reaction. If the species chosen is a reactant which has a concentration c at time t the rate is - dc/dt, while the rate with reference to a product having a concentration x at time t is dx/dt. Any concentration units may be used for expressing the rate; thus, if moles per liter are employed for concentration and seconds for the time, the units for the rate are moles litre–1sec–1. For gas reactions pressure units are sometimes used in place of concentrations, so that legitimate units for the rate would be (mm. Hg) sec–1 and atm. sec–1 The order of a reaction concerns the dependence of the rate upon the concentrations of reacting substances; thus, if the rate is found experimentally to be proportional to the ath power of the concentration of one of the reactants A, to the both power of the concentration of a second reactant B, and so forth, via., rate = k CAα CAβ the over-all order of the reaction is simply n = α + β + ----- (2) Such a reaction is said to be of the αth order with respect to the substance A, the βth order with respect to B.In the following questions, a statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion: The unit of k is independent of order of reaction.Reason: The unit of k is moles L–1s–1.

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Which of the following statements is not correct regarding biomagnification?(i) Mercury accumulated by an organism cannot be metabolised.(ii) In the process of biomagnification, concentration of DDT is increased at successive trophic levels.(iii) Accumulation of cadmium can cause thinning of egg shell in birds.(iv) DDT accumulation is a major cause of reduced population of fish eating birds.(v) Biomagnification occurs only in aquatic food chain.a)(i), (iii) and (v)b)(iii) and (iv)c)(iii) and (v)d)(i), (ii) and (iv)Correct answer is option 'C'. Can you explain this answer?
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Which of the following statements is not correct regarding biomagnification?(i) Mercury accumulated by an organism cannot be metabolised.(ii) In the process of biomagnification, concentration of DDT is increased at successive trophic levels.(iii) Accumulation of cadmium can cause thinning of egg shell in birds.(iv) DDT accumulation is a major cause of reduced population of fish eating birds.(v) Biomagnification occurs only in aquatic food chain.a)(i), (iii) and (v)b)(iii) and (iv)c)(iii) and (v)d)(i), (ii) and (iv)Correct answer is option 'C'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following statements is not correct regarding biomagnification?(i) Mercury accumulated by an organism cannot be metabolised.(ii) In the process of biomagnification, concentration of DDT is increased at successive trophic levels.(iii) Accumulation of cadmium can cause thinning of egg shell in birds.(iv) DDT accumulation is a major cause of reduced population of fish eating birds.(v) Biomagnification occurs only in aquatic food chain.a)(i), (iii) and (v)b)(iii) and (iv)c)(iii) and (v)d)(i), (ii) and (iv)Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is not correct regarding biomagnification?(i) Mercury accumulated by an organism cannot be metabolised.(ii) In the process of biomagnification, concentration of DDT is increased at successive trophic levels.(iii) Accumulation of cadmium can cause thinning of egg shell in birds.(iv) DDT accumulation is a major cause of reduced population of fish eating birds.(v) Biomagnification occurs only in aquatic food chain.a)(i), (iii) and (v)b)(iii) and (iv)c)(iii) and (v)d)(i), (ii) and (iv)Correct answer is option 'C'. Can you explain this answer?.
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