This document is a lecture on biology for class 12 students covering chapter 2. It discusses sexual reproduction in hydroids including the processes of binary fission and budding. It describes the stages of fertilization from gametes to zygote, and the early embryonic stages of gastrulation, neurulation and blastulation. Key terms discussed include sperm, egg, zygote, embryo and stages of development. Evaluation methods like multiple choice questions are also mentioned.

1. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

2. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

3. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

4. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”
cÖvwYicwiwPwZ

5. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

6. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

7. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

8. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

9. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”
১। অয ৌনপ্রজনন
২। য ৌন প্রজনন
A‡hŠb cÖRbb †hŠb cÖRbb

10. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”
মুকুয োদগম দ্বি- দ্বিভোজন

11. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

12. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

13. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

14. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”
শীযের শুরুযেহোইড্রো য ৌনপ্রজনযনরমোধ্যযম িংশদ্বিস্তোর কযর।
হোইড্রোর য ৌনপ্রজননযক চোরভোযগ ভোগ করো োয়-
A¯’vqx Rbbv½ m„wó,
Rbb †Kvl m„wó,
 wb‡lK,
cwiùzUb

15. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

16. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

17. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”
দ্বিম্বোণু
শুক্রোণু
হোইড্রু ো
জোইযগোট
দ্বিস্টিদ্ধভ্রূণ
গযোস্ট্রু োদশো
মরূ োদশো
ব্লোস্টু ো দশো

18. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

19. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

20. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”
মূ যোয়ন

21. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”

22. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XII, CHAPTER-2
Cambrian Education Group“Total Education For All”
শুযভচ্ছো পদ্বরচয় যপ্রষণো দ্বশখনফ মূ পোঠ দ ীয় কোজ মূ যোয়ন িোদ্বিরকোজ িোণী ধ্নযিোদ