1
Question
Pollen sac wings of Pinus is modification of
Pollen sac wings of Pinus is modification of
Open in App
Solution
The correct option is B Exine
Pollen sac wings of Pinus is modification of exine. The female strobili of Gymnosperms contain ovules. The ovule can be found on a megasporophyll, which itself is located on a scale. On each megasporophyll of the female strobilus two seeds can develop after fertilization. In each megasporangium a megasporocyte is present, which leads to four megaspores after meiosis. Three of these megaspores degenerate, only one megaspore is functional and forms the megagametophyte with two or three archegonia containig each one egg cell.
Pollen sac wings of Pinus is modification of exine. The female strobili of Gymnosperms contain ovules. The ovule can be found on a megasporophyll, which itself is located on a scale. On each megasporophyll of the female strobilus two seeds can develop after fertilization. In each megasporangium a megasporocyte is present, which leads to four megaspores after meiosis. Three of these megaspores degenerate, only one megaspore is functional and forms the megagametophyte with two or three archegonia containig each one egg cell.
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
