Which statement about teratogens during prenatal development is correct?
AGenetic codes inherited from the mother that always cause genetic disorders
BEnvironmental agents that cause deviations leading to serious abnormalities or death
CVitamins essential for normal foetal growth during the entire pregnancy
DBrain structures that develop in the third trimester of pregnancy
Answer & Solution
Correct answer: B. Environmental agents that cause deviations leading to serious abnormalities or death
1. The chapter describes prenatal development as sensitive to several maternal factors.
2. It then introduces a category of environmental threats by name.
3. Teratogens are defined as environmental agents that cause deviations in normal development.
4. These deviations can lead to serious abnormalities or death of the foetus.
5. Common teratogens listed include drugs, infections, radiations and pollution.
6. Hence teratogens are environmental agents that can cause serious prenatal harm.
_Source: NCERT Class 11 Psychology Ch 3 "Human Development", p. 46, Prenatal Stage_
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