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Anthophyta & Coniferophyta Significant Life Cycle Adaptations-2 |
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Ovule & Seed-2
A Pollination Drop helps to capture Pollen and draw it inside the Micropyle.
Archegonia
of many other plants may secrete chemotactic agents to attract sperm but I
am not aware of anything 
like the pollination drop in seedless plants like ferns.
The Stigmas of flowering plants can secrete a fluid which helps collect Pollen and can stimulate or block pollen germination.
The restricted location of the Embryo Sac (Anthophyta) helps to reduce multiple fertilizations. This is especially true where only one egg may be present at the Micropyle.
Multiple fertilizations are still common in gymnosperms like Conifers. This sets up a competitive situation in which several embryos compete for resources. Consequently, there will be a suboptimal level of nutrients for the dominant embryo.
