The Highly Productive Varieties of Wheat and Rice That Were

question 80

Multiple Choice

The highly productive varieties of wheat and rice that were developed in the Green Revolution produce lots of seeds. Given that evolutionary fitness is measured in terms of reproductive success (for which total seed production is a good proxy) , why might natural selection have failed to produce these highly productive varieties on its own, without the work of human plant breeders?

• A)Green Revolution crops require too much nitrogen to develop normally without added fertilizer.
• B)Green Revolution crops require too much water to develop normally without irrigation.
• C)Green Revolution crops have reduced root elongation and thus are sensitive to natural droughts.
• D)Green Revolution crops have reduced stem elongation and thus are poor competitors for sunlight compared to wild plants.

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