Monday, October 29, 2012


October 19 - October 26, 2012

We talked about several concepts, but I focused on pollination because it seems to have caught my attention the most. Pollination is ransfer of pollen from the anthers of a flower to the stigma of the same flower or of another flower.  Pollination is a prerequisite for fertilization, which allows the flower to develop seeds. 
Some flowers will develop seeds as a result of self-pollination, when pollen and pistil are from the same plant. Other plants require cross-pollination and for this pollen and pistil must be from different plants.

When plants need help moving pollen from one flower to the pistil of another.  Wind moves the pollen for some plants such as grasses like corn.  Animal pollinators move pollen for many other flowering plants.

Pollinator is an animal that moves pollen from the anthers to the stigmas of flowers, thus effecting pollination.  Animals that are good pollinators of flowers include bees, butterflies, hummingbirds, moths, some flies, some wasps, and nectar feeding bats.   

Plants benefit from pollinators because the movement of pollen allows them to reproduce by setting seeds.  However, pollinators don't know or care that the plant benefits.  They pollinate to get nectar and/or pollen from flowers to meet their energy requirements and to produce offspring.  In the economy of nature, the pollinators provide an important service to flowering plants, while the plants pay with food for the pollinators and their offspring.

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