| 词汇 | chalaza |
| 释义 | BETA Examples of chalazachalaza isn’t in the Cambridge Dictionary yet. You can help! The chalaza, where the ovule was attached to the fruit, was the last portion of the seed to become impermeable. The nucellus is uniseriate, contains a thin-walled seed megaspore, and appears to be connected to the integument towards the chalaza only. A spine may either be a "chalaza" (having a single point) or a "scolus" (having multiple points). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Located opposite from the micropyle is the chalaza where the nucellus is joined to the integuments. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In chalazogamous fertilization, the pollen tubes penetrate the ovule through the chalaza rather than the micropyle opening. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He describes the standard arrangement in angiospermsthe nucellus joined by the chalaza to the integuments, which surround the nucellus except at the micropyle, through which the pollen tubes enter. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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