Darwin observed an orchid flower with petals arranged in very long, thin tubes, rather than broad and flat, as we might see in other common flowers. What is the advantage to the orchid having an 11-inch-long nectar tube arrangement of the petals?
A. The long tube can trap insects as a source of nutrients.
B. The flower can collect more sunlight for photosynthesis.
C. The flower can produce nectar more easily spread over a larger area to attract more pollinators.
D. The flower nectar tube can collect more rainwater to maintain health of the flower.
E. The flower can only be pollinated by a specifically adapted pollinator, reducing cross-fertilization among orchid species.
E. The flower can only be pollinated by a specifically adapted pollinator, reducing cross-fertilization among orchid species.
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