CBSE Class 10 Answered
plz answer this
Asked by satya36 | 08 Sep, 2009, 06:23: PM
Expert Answer
A pollen grain is deposited on stigma in 2 celled stage i.e. a small generative cell and a large tube cell. When the pollen grain germinates, the intine grows and comes out in the form of pollen tube through the germ pore of the exine. It carries along with it both generative and tube nuclei. The pollen tube bores its way down the tissue of stigma and style. The generative nucleus then divides to form 2 non-motile haploid male gametes surrounded by a mass of cytoplasm. The tube nucleus gets disorganised sooner or later. Thus the pollen tube contains only 2 cells i.e. the 2 male gametes.
Answered by | 14 Sep, 2009, 09:45: AM
Application Videos
Concept Videos
CBSE 10 - Biology
Asked by ar3886267 | 01 Mar, 2024, 05:57: PM
ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by janu69659 | 28 Feb, 2024, 09:12: PM
ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by baibhabsenapati | 16 Feb, 2024, 01:29: PM
ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by mohammedtaiyabt | 14 Feb, 2024, 05:42: AM
ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by ananyapatharidav | 06 Feb, 2024, 06:51: PM
ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by artikumari118 | 05 Feb, 2024, 10:45: AM
ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by muskan.bharti.dih | 08 Nov, 2023, 11:53: AM
ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by saritadiwakarjha | 09 Mar, 2023, 02:45: AM
ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by ten.foundation | 15 Jul, 2022, 02:32: PM
ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by winkeyroy98 | 15 Jul, 2022, 02:30: PM
ANSWERED BY EXPERT