what fills the wings that develop on pollen in gymnosperms?
Answers
Explanation:
The pollen of pine, four-celled when shed, is characterized by two lateral air-filled “wings,” enlarged cavities between two layers of the pollen-grain wall. The pollen is produced in large amounts and may be transported great distances by air currents.
LOAD PREVIOUS PAGE
Gymnosperms
The cycads are slow-growing dioecious (species with individuals that are either male or female) gymnosperms, the microsporangia (potential pollen) and megasporangia (potential ovules) occurring on different individual sporophytes. In all cycads except the genus Cycas, the ovules are borne on megasporophylls in megastrobili; in Cycas the ovules develop on individual leaflike megasporophylls in what is regarded as a primitive arrangement. The microspores of all cycads develop into microstrobili.
Hope it will help you