Biology for IGCSE & O level - Variation And Selection (Section 5 - No. 29)
Bird pollination, as described, gives plants a selective advantage by:
Increasing seed dispersal distance
Protecting flowers from ground predators.
Providing pollinators with a place to perch and feed.
Reducing competition with other plant species.
Explanation
The text describes how the perch-like structure on the plant enables birds to access the nectar, and providing the birds with a foothold to feed.
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