A white pettle flower in virtical. The primary purpose of a flower is reproduction. Since the flowers are the reproductive organs of plant, they mediate the joining of the sperm, contained within pollen, to the ovules ââ¬â contained in the ovary. Pollination is the movement of pollen from the anthers to the stigma. Why do plants have a flower? Pollen is a collection of male reproductive cells that will fertilize ovules to produce seeds. When the flower blooms, male pollen cells are scattered by insects or by the wind. ... Some kinds of plants produce only complete flowers. Other plants produce both male and female incomplete flowers on the same plant.
圖片編號:
123904908
拍攝者:
Onassisworld
點數下載
授權類型 | 尺寸 | 像素 | 格式 | 點數 | |
---|---|---|---|---|---|
標準授權 | XS | 270 x 480 | JPG | 13 | |
標準授權 | S | 450 x 800 | JPG | 15 | |
標準授權 | M | 1299 x 2309 | JPG | 18 | |
標準授權 | L | 1677 x 2981 | JPG | 20 | |
標準授權 | XL | 2121 x 3771 | JPG | 22 | |
標準授權 | MAX | 3096 x 5504 | JPG | 23 | |
標準授權 | TIFF | 4378 x 7784 | TIF | 39 | |
進階授權 | WEL | 3096 x 5504 | JPG | 88 | |
進階授權 | PEL | 3096 x 5504 | JPG | 88 | |
進階授權 | UEL | 3096 x 5504 | JPG | 88 |
XS
S
M
L
XL
MAX
TIFF
WEL
PEL
UEL
標準授權 | 270 x 480 px | JPG | 13 點 |
標準授權 | 450 x 800 px | JPG | 15 點 |
標準授權 | 1299 x 2309 px | JPG | 18 點 |
標準授權 | 1677 x 2981 px | JPG | 20 點 |
標準授權 | 2121 x 3771 px | JPG | 22 點 |
標準授權 | 3096 x 5504 px | JPG | 23 點 |
標準授權 | 4378 x 7784 px | TIF | 39 點 |
進階授權 | 3096 x 5504 px | JPG | 88 點 |
進階授權 | 3096 x 5504 px | JPG | 88 點 |
進階授權 | 3096 x 5504 px | JPG | 88 點 |