জ্ঞাতাৰ্থে জনাওঁ যে এই ৱেব চাইটৰ নিৰ্দিষ্টকালীনলৈকে কোনো পষ্ট প্ৰকাশ কৰিব নোৱৰা হৈ থকাৰ কাৰণে www.ekarsangtakar.com চাইটতে সকলো প্ৰশ্নকাকত সমূহ প্ৰকাশ কৰাৰ ব্যৱস্থা কৰিছে.
Reproductivre Biology and Angiosperm,
Botany honours , CBCS ,
CORE-11,QUESTION PAPER 2022
Bsc 5th semester
1. (a) Choose the correct answer of the following: 1x3=3
(i) In angiosperms the endosperms is
(1) triploid (3n)
(2) diploid (2n)
(3) haploid (n)
(4) None of the above
(ii) When the body of the ovule, embryo sac, micropyle and funicle, all lie in one vertical plane the ovule is
(1) anatropous
(2) orthotropous
(3) amphitropous
(4) campylotropous
(iii) The process of double fertilization (triple fusion) was discovered by
(1) Nawaschin
(2) Leeuwenhoek
(3) Strasburger
(4) Hofmeister
(b) Fill in the blanks of the following: 1x2=2
(i) Finger-like projections present in synergids are called __________
(ii) Typical 8-nucleate embryo sac is called____
2.. Write precise notes on the following 4*3-12 (a)Double fertilization and its significance
(b)NPC system
(c)Apomixis
3. What is microspore? Describe the formation of microspores within the microsporangium. Draw diagram where necessary. 2+8+2=12
Or
Answer/Write following note of th explanatory
6+6=12
(a) "The flower is equivalent to a modified shoot." Justify the statement with reasons. 6) Polyembryony and its significance
4. What do you mean by embryogenesis? Describe the stages of development of a typical dicot embryo giving necessary diagram. 2+8+2=12
Or
Write notes of the following: 4x3=12
(a) Monosporic type of embryo sac
(b) Parthenocarpy and its significance 3 Difference between dicot and monocot embryo
5. What is self-incompatibility? Describe about the homomorphic and heteromorphic self incompatibility. What are the methods to overcome self-incompatibility? 2+6+4=12
Or
Describe the different types of contrivances of cross-pollination giving example in each case. Why nature prefers cross-pollination? 8+4=12
For download in PDF mood for this
Click here
click me 1(yuotube)
