Given below are two statements: Statement I: Bioconcentration in humans can…
2022
Given below are two statements:
Statement I: Bioconcentration in humans can occur due to consumption of fish.
Statement II: Bioconcentration is the tendency of hazardous substances to accumulate in human tissues.
In the light of the above statements, choose the correct answer from the options given below:
Answer: D. Statement I is false but Statement II is true — ConceptBioconcentration is the buildup of a chemical in an organism through direct uptake from the surrounding environmental medium; in aquatic settings this…
- A.
Both Statement I and Statement II are true
- B.
Both Statement I and Statement II are false
- C.
Statement I is true but Statement II is false
- D.
Statement I is false but Statement II is true
Attempted by 1 students.
Show answer & explanation
Correct answer: D
Concept
Bioconcentration is the buildup of a chemical in an organism through direct uptake from the surrounding environmental medium; in aquatic settings this usually means uptake from water. Bioaccumulation is broader and includes all exposure routes, while biomagnification describes transfer and increasing concentration across trophic levels.
Application
Statement I describes human exposure by eating contaminated fish. That is dietary trophic transfer rather than direct uptake from a surrounding medium, so Statement I is false for bioconcentration.
Statement II is technically broad because it states tissue accumulation without the defining direct-medium route. Nevertheless, the NTA final key for this exact UGC NET item accepts that broad tissue-accumulation description and marks Statement II true.
Combining the two exam-key classifications gives Statement I false and Statement II true.
Cross-check / contrast
Direct surrounding medium to organism: bioconcentration.
All exposure routes within one organism: bioaccumulation.
Increasing concentration through successive trophic levels: biomagnification.
Option-value contrast
Both Statement I and Statement II are true includes dietary fish intake within bioconcentration.
Both Statement I and Statement II are false rejects the broad tissue-accumulation reading used by the NTA key.
Statement I is true but Statement II is false both includes dietary intake and rejects the NTA key’s broad reading.
Statement I is false but Statement II is true is the classification recorded in the official final key.
Result
Statement I is false, while Statement II is true.