Characteristics
Characteristics
Characteristics
Characteristics
It is the group with the largest percentage of known plant species.
The plant is the sporophyte, and the gametophyte is reduced.
In the stamens, there is the pollen sac, where the spores are formed by meiosis, generating pollen grains. In the pistils, meiosis forms the megaspore -this will give rise to the embryo sac.
Pollination: transport of the pollen grain from one plant to the pistil of another.
Double fertilization occurs (forming the embryo and the endosperm).
The endosperm (3n) is the nutritional reserve of the embryo.
After fertilization, the ovary becomes a fruit, and the ovules become seeds.
Transpiration occurs in any part of the plant that is above ground. However, most transpiration occurs in the leaves.
The biggest loss of water occurs through the stomas.
The stomas open when there is light and water availability.
And they close with excessive loss of water or the lack of light.
The low concentration of carbon dioxide also stimulates the stomas to open.
The removal of a ring -in the bark of the tree- interrupts the flow of the phloem and causes the death of the cells due to lack of nutrients.
The phloem, like the xylem, is an important plant conducting tissue. This tissue is concerned with the transport of important substances. Some examples are sucrose, amino acids, hormones, and vitamins.
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