A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants plants of the division Magnoliophyta, also called angiosperms. The biological function of a flower is to affect reproduction, usually by providing a mechanism for the union of sperm with eggs. Flowers may facilitate outcrossing fusion of sperm and eggs from different individuals in a population or allow selfing fusion of sperm and egg from the same flower. Some flowers produce diaspores without fertilization parthenocarpy. Flowers contain sporangia and are the site where gametophytes develop. Many flowers have evolved to be attractive to animals, so as to cause them to be s for the transfer of pollen. After fertilization, the ovary of the flower develops into fruit containing seeds.
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167614514
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Thejj332000
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授權類型 | 尺寸 | 像素 | 格式 | 點數 | |
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標準授權 | XS | 238 x 480 | JPG | 13 | |
標準授權 | S | 397 x 800 | JPG | 15 | |
標準授權 | M | 1504 x 3034 | JPG | 18 | |
標準授權 | L | 1574 x 3175 | JPG | 20 | |
標準授權 | XL | 1991 x 4017 | JPG | 22 | |
標準授權 | MAX | 2438 x 4920 | JPG | 23 | |
標準授權 | TIFF | 2127 x 4291 | TIF | 39 | |
進階授權 | WEL | 2438 x 4920 | JPG | 88 | |
進階授權 | PEL | 2438 x 4920 | JPG | 88 | |
進階授權 | UEL | 2438 x 4920 | JPG | 88 |
XS
S
M
L
XL
MAX
TIFF
WEL
PEL
UEL
標準授權 | 238 x 480 px | JPG | 13 點 |
標準授權 | 397 x 800 px | JPG | 15 點 |
標準授權 | 1504 x 3034 px | JPG | 18 點 |
標準授權 | 1574 x 3175 px | JPG | 20 點 |
標準授權 | 1991 x 4017 px | JPG | 22 點 |
標準授權 | 2438 x 4920 px | JPG | 23 點 |
標準授權 | 2127 x 4291 px | TIF | 39 點 |
進階授權 | 2438 x 4920 px | JPG | 88 點 |
進階授權 | 2438 x 4920 px | JPG | 88 點 |
進階授權 | 2438 x 4920 px | JPG | 88 點 |