B.Sc. Hons Botany Sem-3 CC-6 Calcutta University Exam Question Paper

B.Sc. Hons Botany Sem-3 CC-6 Calcutta University Exam Question Paper

2020
BOTANY — HONOURS
Paper : CC-6
Full Marks: 50
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable

1. Answer the subsequent questions :
(a) what’s perisperm? Give an example. 1+1
(b) what’s a compound spadix inflorescence? 1
(c) Define schizocarpic fruit. Give an example. 1+1
(d) Define aggregate fruit. 1
(e) what’s hypocrateriform corolla? Give an example. 1+1
(f) what’s apogamy? 1
(g) How a spike differs from a raceme inflorescence? 1
2. Answer any two from the subsequent :
(a) Write a brief note on apomixis in angiosperms. 5
(b) Distinguish between cyathium and hypanthodium inflorescences with one example each. 2½+2½
(c) With suitable examples describe different fleshy indehiscent fruits. 5
(d) Describe differing types of plant part entry into ovule with examples. 5
3. Answer any three from the subsequent :
(a) what’s cymose inflorescence? Describe differing types of cymose inflorescences. 2+8
(b) Define double fertilization. Describe double fertilization with suitable diagrams. 3+7
(c) what’s megasporogenesis? Describe monosporic and bisporic sorts of megagametogenesis. 2+4+4
(d) Describe the genetic and molecular aspects of flower development. 10
(e) With labelled diagrams describe four differing types of ovule.

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