Why can flowering plants not reproduce without pollination? explain

Pollination is very important. It leads to the creation of new seeds that grow into new plants.

But how does pollination work? Well, it all begins in the flower. Flowering plants have several different parts that are important in pollination. Flowers have male parts called stamens that produce a sticky powder called pollen. Flowers also have a female part called the pistil. The top of the pistil is called the stigma, and is often sticky. Seeds are made at the base of the pistil, in the ovule.

To be pollinated, pollen must be moved from a stamen to the stigma. When pollen from a plant's stamen is transferred to that same plant's stigma, it is called self-pollination. When pollen from a plant's stamen is transferred to a different plant's stigma, it is called cross-pollination. Cross-pollination produces stronger plants. The plants must be of the same species. For example, only pollen from a daisy can pollinate another daisy. Pollen from a rose or an apple tree would not work.

But how does pollen from one plant get moved to another?

En la difusión facilitada, las moléculas solo se mueven con la ayuda de una proteína en la membrana. En difusión simple, las moléculas se mueven hacia abajo del gradiente de concentración, pero en la difusión facilitada las moléculas se mueven hacia arriba en el gradiente de concentración. La difusión simple es pasiva, pero la difusión facilitada es un proceso activo que utiliza energía.

¡Espero que esto ayude!

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