Vascular plants with protected seeds

Vascular plants with protected seeds - distinguishing...

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Vascular plants with protected seeds (angiosperms) The angiosperms are the most developed and most complex vascular plants. They are  the  flowering plants , of which more than a quarter of a million species have been  identified. Almost all vegetables, flowers, fruits, cereals, grains, grasses, and hardwood  trees are angiosperms, the dominant life-form on earth today.  Angiosperm means “seed vessel,” a reference to the female tissues that enclose the  seed. The tissue is  endosperm.  During embryonic development, the endosperm serves  as a source of nourishment. In many angiosperms, the endosperm develops into the  fruit of the plant. Thus, the protected seed is often found within a fruit. The two most 
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Unformatted text preview: distinguishing features of angiosperms are the flower and the fruit. The flower of an angiosperm (see Figure 1 ) consists of a ring of modified leaves called sepals that enclose and protect the growing flower bud. In some species, the sepals are small and green, while in others they become colored and resemble the petals, the next ring. Flower petals are colorful and are useful in attracting pollinating animals, especially insects. Within the petals are the organs of reproduction: the male stamens and, at the center, the female pistil....
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This note was uploaded on 11/11/2011 for the course BIO 101 taught by Professor Pesthy during the Fall '07 term at Texas State.

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