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Compare the structure of wind-pollinated and insect-pollinated flowers. - Leaving Cert Agricultural Science - Question 2 - 2014
Question 2
Compare the structure of wind-pollinated and insect-pollinated flowers.
Worked Solution & Example Answer:Compare the structure of wind-pollinated and insect-pollinated flowers. - Leaving Cert Agricultural Science - Question 2 - 2014
Step 1
Wind Pollinated Flowers
Answer
Wind-pollinated flowers typically lack conspicuous petals and do not have nectaries. They feature a large amount of pollen produced, as wind disperses the pollen over larger areas. The pollen grains are usually smaller and smooth, allowing them to be carried easily by the wind. The anthers are typically located outside the flower for effective pollen release, and the stigma is also positioned outside the flower with a feathery, sticky structure to catch the airborne pollen.
Step 2
Insect Pollinated Flowers
Answer
In contrast, insect-pollinated flowers possess conspicuous petals that are often brightly colored to attract pollinators. These flowers also typically have nectaries to reward insects for their visit. The amount of pollen produced is generally less than that of wind-pollinated flowers, and the pollen grains are larger and have spiky surfaces to aid adherence to the bodies of insects. Insect-pollinated flowers have anthers usually positioned inside the flower, which facilitates contact with pollinators, and the stigma tends to be sticky to effectively capture pollen from visiting insects.