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Classification of fruits

Biology

POLLINATION

POLLINATION What is pollination? This is the transfer of pollen grains from the anther to the stigma. Types of pollination Self pollination is the transfer of pollen grains from the anther of one flower to the stigma of the same flower. Cross-pollination is the transfer of pollen grains from the anther of one flower to the stigma of a different flower, of the same species.   Agents of pollination Agents of pollination include wind, insects, birds and mammals. Insect pollinators include bees, butterflies and mosquitoes.   Mechanisms that hinder self-pollination Stamens ripen early and release their pollen grains before the stigma, mature. This is called protandry e.g. in sunflower. The stigma matures earlier and dries before the anthers release the pollen grains. This is called protogyny and is common in grasses. Self-sterility or incompatibility Pollen grains are sterile to the stigma of the same flower, e.g. in maize flower. Shorter… Read More »POLLINATION

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