SSC Ecology And Environment Sample Paper NCERT Sample Paper-3

  • question_answer
    Very harmful particles for humans present in atmosphere are

    A)  Lead and arsenic

    B)         Lead and mercury

    C)  Mercury and cadmium   

    D)  Zinc and iron

    Correct Answer: B

    Solution :

    [b] Heavy metals are toxic to humans. Two of the most common and widely studied of these metals are lead and mercury, both of which are highly toxic to the developing brain and nervous system. Excessive exposure can begin in the intrauterine period, leading to adverse effects at birth. Prenatal exposure is more common with mercury, whereas lead poisoning is more common during the first few years of life.

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