9.10 Evolution of Seed Habit | Process of seed evolution | kingdom plantae
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- Опубліковано 5 вер 2024
- #Evolutionofseed
#seedevolution
#Evolutionofseedhabit
#seedFormation
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One of the most significant events in the history of terrestrial plants was the development of seed habit. It was an essential change in the reproductive system of the vascular plants which occurred approximately 390 million years ago. The first complete seeds appeared roughly 365 million years ago throughout the late Devonian era. Technically a seed may be defined as a fertilized ovule.
An ovule is an integumented indehiscent megasporangium. Integuments are specialized protective coverings around megasporangium which differ in number. All seed-producing plants are called spermatophytes. Various actions involved in the evolution of seed habit are as follows.
Evolution of heterospory
Retention and germination of megaspore within the megasporangium
Development of protective layers around megasporangium
Reduction to a single functional megaspore per sporangium
Development of an embryo sac within the sporangium
Modification of distal end of megasporangium for pollen capture
Ma Sha Allah, there is no doubt in your lecture. Continue this method.
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Sir may u live long
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aoa sir plz bs classes k liye b upload kr dn seed habit, whole topic......😊😊
Alllah apko bht bht jazaye khair de.......... The lecture helps alot..... Allah apko aafiyat de.... Aur jannat m aaaala maqam de. Ameen
Ameen
Phly tum jannat m ala muqam dala du😂.
Zindagi ki dua mang pagal insaan.
Mashallah sir your teaching method is adorable..........May Allah gives you a big reward for this good deed😊❤💚
MashaAllah❤❤❤❤
Sir ap Keh parhany ka andaz bhot acha hain........bhot achi Samaj ati hain aur sab concepts bhi clear ho ghy...... Jazakallah for making such amazing videos.
sir g.level hogiaa.ap ki kia hi bat hai.very niceeeeeeeeeee.
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My teacher also delivered lecture same your method 😊❤
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Thank you so much sir
ur teaching method is too good MashAllah😊
Wao sir Amazing lecture 💞👍
Thanks sir God bless you
Bhut shi bhut shi explanation 🤩
Allah apko jzay kher dy
JAZAKALLAH khair sir
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Mashallah 💕
Sir kamal am listening ur lecture on the day of my board exam😅♥️Allah bless u sir
well explained
Great
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MashaAllah
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sir hum is mn diagram kon c bbnaye gay???
plzz bta dn😢
Sir what is mean by:THE EVOLUTION OF POLLEN TUBE PARALLELS THE EVOLUTION OF SEED .
sir gymnospermae ka lecture kahan hai?
A.o.A
How are you sir? Sir I have found you so intelligent Allah bless you always..
Sir I have done msc zoology from uaf (faisalabad) now I am doing M.Phil in microbiology ...some peoples are saying to me that you have changed your field so you might be face some problem ...sir what would you suggest me??
W salam dear no problem apko job msc base pe he mily gi
Thanku sir.❤
❤father ❤of ❤ biology ❤ Muhammad ❤Aamir❤Shahzad❤🎉❤🎉
Is there any lecture of evolution of fruit habit?
Sir special exam ky liye 2nd year biology ky guess ki video bnayen?????Plzzzzzz
Sir jin students na special papers dana h Un ka Liya koi tips bta da
Sir jb megaspore mother cell diploid hai to ye (n) 4 megaspores mai kaisay divide ho skta hai
Sir gi please special exam ka lien guess paper upload karein 💕💕💯
Sir mujy bat pochni hai plz sir reply zaror krin time uni multan HEC sy register hai ya ni us ki dgree chaly gi ys ni
Good😍😍
Sir plZ biology 2nd year special exam k paper ki pic upload kr dein ...
( MCQs Gujranwala board
Haploid cell ku disintegrate huwy
Sir 11th biology k baki chapters k lectures b upload kar dain 4 tak to han us sy agy nai han please wo b upload kar dain
G i am trying dear ...chap 9 complete ho jay than in sha ALLAH
@@irtisamsbiology bohat shukria ❤️
Sir ap konsa board pahraty hein?
Sir ap ny last year waly lecture kyun delete kr deye?.... Wo bhe boht achy thy if I'm not wrong ap ny is chapter ky phly jo topic thy wo delete kr ky new upload kiye han.... Ap wo bhe dobra share kr daen.... please
Ni beta ek b dell ni kia
Sir kis board ke syllabus ko follow karte Hy sindh ya federal
MashaAllah❤❤❤❤
Thank you so much sir