JUNE – 2021
B. Sc. (VI Semester) Examination
BOTANY
Paper: BOT-361
(Environmental Biology and Biostatistics)
Full Marks : 80
Pass Marks : 35%
Time : Three Hours
Note: (i) All questions are compulsory.
(ii) The figures in the margin indicate full marks for the questions.
1. Define and briefly explain the following (any five): 2x5= 10
(a) Food web
(b) Ecades
(c) Niche
(d) Endemism
(e) t-test
(f) Ecosystem
(g) Growth curve
(h) Nature of climax
2. Answer any six of the following: 5x6= 30
(a) Briefly write about the concept of ecosystem
(b) Write a note on Nitrogen biochemical cycle
(c) Explain briefly about population characteristics
(d) Write a brief note on ecological succession
(e) Mention various sources of water pollutions
(f) Explain briefly food chain with suitable example and diagram
(g) Draw a light on impact of soil pollution on plant and ecosystems
(h) Write the important utility of biostatistics
3. Answer any four of the following: 10x4= 40
(a) Define primary productivity and explain its measurement with suitable illustration
(b) What is community ecology? Write the different characteristics of community ecology with suitable example
(c) Write in detail about the vegetation types of North-East India
(d) Discuss the causes, effect and control of water pollution on aquatic ecosystem
(e) Explain briefly t-test and chi-square test and their applications
(f) Define ecological succession and briefly explain its types with suitable diagrams.
