PUNJAB PUBLIC SERVICE COMMISSION
COMBINED COMPETITIVE EXAMINATION
FOR RECRUITMENT TO THE POSTS OF PROVINCIAL MANAGEMENT SERVICE -2023
BOTANY (PAPER-I)
TIME ALLOWED: THREE HOURS
MAXIMUM MARKS: 100
NOTE:
1. All the parts (if any) of each Question must be attempted at one place instead of at different places.
2. Write Q. No. in the Answer Book in accordance with Q. No. in the Q. Paper.
3. No Page/Space be left blank between the answers. All the blank pages of Answer Book must be crossed.
4. Extra attempt of any question or any part of the question will not be considered.
Attempt FIVE Questions in All. Attempt in Urdu or English.
Q. No.1
(a) Mention general characteristics and economic importance of Bacillariophyta.
(b) Give outline of life cycle of a typical Diatom.
(10+10=20 Marks)
Q. No.2
(a) Describe various modes of reproduction in Pythium.
(b) Write note on early blight of potato disease.
(10+10=20 Marks)
Q. No.3
(a) Explain gametophyte structure of Funaria.
(b) How sporophyte of Anthoceros is considered advanced? Give point wise detail.
(10+10=20 Marks)
Q. No.4 What are fossils? How fossils are formed? Discuss various modes of preservation with respect to organic origin? (20 Marks)
Q. No.5 Describe the salient features of gymnosperms. Explain in detail how gymnosperms are beneficial for mankind? (20 Marks)
Q. No.6 Describe in detail the stomata with respect to their origin, structure types and functions? (20 Marks)
Q. No.7
(a) What is biosystematics? How Operational Taxonomic Units (OTUs) are significant for arranging the plants into groups?
(b) What is sporogenesis? Discuss the various ways of micro- and megasporogenesis in plants?
(10+10=20 Marks)
Q. No.8 Explain structure and morphological nature of sporocarp of Marsilia. (20 Marks)
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