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Which of the following statements about heavy metal uptake by plants is correct?

  1. Vegetables like brinjal, gourd, spinach, coriander, tomato, and pumpkin are susceptible to heavy metal uptake by their roots.
  2. Heavy metals are not absorbed by the roots of plants.
  3. Heavy metals are only absorbed by the leaves of plants.
  4. Plants can effectively remove heavy metals from the soil without any risk.

    Aiv only

    BNone of these

    Ci, iv

    Di only

    Answer:

    D. i only

    Read Explanation:

    • Mercury exposure can result in various health problems, including Alzheimer's disease, lung damage, and skin issues such as the common ailment. Acrodynia is a common skin ailment in which skin colour becomes pink.

    • Cadmium is a highly toxic metal that causes bone damage and acute exposure can lead to renal dysfunction, while prolonged exposure to high levels of Cd can result in lung damage.

    • Heavy metals can also induce DNA damage, cause chromosome aberrations, and alter DNA replication and transcription.

    • Exposure to Chromium over a long period can result in the formation of ulcer.


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    What is the role of Nitrogen Monoxide (NO) in atmospheric chemistry?

    1. NO is a significant precursor to ozone formation.
    2. NO directly contributes to acid rain formation.
    3. NO is a pollutant closely linked to asthma.
    4. NO helps in the removal of greenhouse gases from the atmosphere.
      Which of the following metals is NOT explicitly mentioned as a heavy metal posing a significant threat due to toxicity?
      കേന്ദ്ര മലിനീകരണ നിയന്ത്രണ ബോർഡിൻ്റെ ആസ്‌ഥാനം ?
      For highly exposed sub-populations, the margin of safety between daily intake and intake causing effects for cadmium is: