The green revolution in India was primarily based on the introduction of:
A. Organic farming
B. Genetically modified crops
C. High-yielding varieties of wheat and rice
D. Aquaculture
Answer: Option C
Solution (By JKSSB Mock Tests)
The Green Revolution (1960s-70s) involved adopting high-yielding varieties (HYVs) of wheat and rice, along with chemical fertilizers, pesticides, and irrigation, leading to dramatic increases in food grain production in India. Norman Borlaug was instrumental. GM crops came later. Organic farming is traditional and low-input.
Consider the following statements about the nervous system:
1. Motor neurons carry impulses from the CNS to effectors.
2. Sensory neurons carry impulses from receptors to the CNS.
3. Interneurons are found only in the peripheral nervous system.
Which of the above is/are correct?
Explanation:
The correct taxonomic hierarchy in ascending order is: Species (lowest) → Genus → Family → Order → Class → Phylum (or Division in plants) → Kingdom (highest). Some classifications add Domain above Kingdom. This system groups organisms based on shared characteristics. Binomial nomenclature uses Genus and Species. Option A correctly places Family before Order.
Explanation:
In botanical classification, the term 'Division' corresponds to 'Phylum' in zoological classification. For example, flowering plants are in the Division Magnoliophyta (or Angiosperms), while animals are in Phyla like Chordata. The hierarchy is Kingdom → Division/Phylum → Class → Order → Family → Genus → Species. This terminological difference is a key point in taxonomy.
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