CBSE 2025 · Region 5 · Set 1 · Q30 · 4 marks
In $\displaystyle 2021$, $\displaystyle 5 \cdot 3$ percent of $\displaystyle 15$ to $\displaystyle 16$-year-olds worldwide ( $\displaystyle 13 \cdot 5$ million individuals) had used Cannabis in the past year according to UNODC. The adolescent brain is still developing and drug use can have long-term negative effects. Early drug use initiation can lead to faster development of dependence than in adults and other problems in adulthood. Parts of the Amazon Basin are at the intersection of multiple forms of organised crimes that are accelerating devastation, with severe implications for the security, health and well-being of the population across the region. The direct impact of coca cultivation on deforestation is minimal, but indirectly it acts as a catalyst for "Narco-deforestation". The laundering of drug trafficking profits into land speculation etc. is posing a growing danger to the world's largest rainforest.(a)Which age group or period of growth people are more vulnerable to drug abuse ?(b)Explain the negative impact of coca cultivation on the world's largest rainforest.(c)From which part of the plant are cannabinoids mainly obtained ? Mention any one negative effect of this drug on adolescents.(ii)State the scientific name of the plant from which coca alkaloids are derived and state one negative impact of use of excessive dosage of cocaine.
In $\displaystyle 2021$, $\displaystyle 5 \cdot 3$ percent of $\displaystyle 15$ to $\displaystyle 16$-year-olds worldwide ( $\displaystyle 13 \cdot 5$ million individuals) had used Cannabis in the past year according to UNODC. The adolescent brain is still developing and drug use can have long-term negative effects. Early drug use initiation can lead to faster development of dependence than in adults and other problems in adulthood. Parts of the Amazon Basin are at the intersection of multiple forms of organised crimes that are accelerating devastation, with severe implications for the security, health and well-being of the population across the region. The direct impact of coca cultivation on deforestation is minimal, but indirectly it acts as a catalyst for "Narco-deforestation". The laundering of drug trafficking profits into land speculation etc. is posing a growing danger to the world's largest rainforest.
(a)
Which age group or period of growth people are more vulnerable to drug abuse ?
(b)
Explain the negative impact of coca cultivation on the world's largest rainforest.
(c)
From which part of the plant are cannabinoids mainly obtained ? Mention any one negative effect of this drug on adolescents.
(ii)
State the scientific name of the plant from which coca alkaloids are derived and state one negative impact of use of excessive dosage of cocaine.
Marking-scheme solution
(a)
$\displaystyle 15$ – $\displaystyle 16$ years or Adolescence period ($\displaystyle 12$-$\displaystyle 18$ years of age)
(b)
Clearing of forest / deforestation / Narco-deforestation / extinction of species / promotes
monoculture that will further lead to loss of
(c)
• Inflorescence / flower tops / leaves / resin.
• Affects the cardiovascular system of the body
(ii)
Erythroxylum coca
Causes hallucinations.
Human Health and DiseaseDrugs and Alcohol AbuseUnderstandcase_studymedium
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CBSE Class 12 Biology past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.