Biology Introduction Into Fertilization of Flowers

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INTRODUCTION INTO SEEDS AND FLOWERS

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The cycle of life for a plant starts off as a seed. The seed goes through mitosis and turns into a nature plant, which sometimes may produce flowers and fruits. Fruits are where the new seeds can be found, continuing the life cycle. A monocot seed with 2 genetic codes (2N) would grow by mitosis. The growth by mitosis would lead to the growth of the apical tips. The meristem cells (stem cells) keep dividing. Then the zone of elongation, the plant would get longer and grow. Eventually the cells would become specialized. The apical tips are at the top and bottom of the plant: causing it to grow roots and become taller. The plant eventually grows its roots, a stem, and 2 leaves.

****Woody dicot: the meristem cells are found in the cambium, causing the plant to increase its diameter.

Taking a Flower Apart: SEPALS/PETALS, PISTIL/STAMENS, POLLINATORS/WIND, PISTIL/STAMEN.

When we take a look at a flower, it is composed of many parts. Flowers have sepals, which are the leaves that open up. Above the sepals lie the petals, which carry the pistil and stamens. Sepals once covered the flower buds, but eventually open up. The petals are there to attract pollinators such as bees and humming birds. Petals attract pollinators so that they can transport pollen from flower to flower. Plants without petals depend on the wind to carry the pollen. The stamens are the males fertilizing organs and the pistil is the female fertilizing organ.The stamen is composed of the filament and anther. The pistil is composed of the ovary, style, and stigma.

****** Note that, some plants can have both sexes (both organs), therefore can fertilize themselves. On the other hand, some plants have separate sexes (organs), therefore cannot fertilize themselves and depend on the pollinators and wind to carry around the pollen.

STAMEN of the PLANT: ANTHER, SPORES (ASEXUAL):

The anther of the...
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