FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION FOR RECRUITMENT TO POSTS
IN BPS – 17 UNDER THE FEDERAL GOVERNMENT, 2005.
BOTANY, PAPER – II
TIME ALLOWED: THREE HOURS MAXIMUM MARKS:100
NOTE: (i) Attempt FIVE questions in all including question No. 8 which is compulsory. All questions carry EQUAL marks.
1 (a) Discuss the role of light and the transformation of CO2 in photosynthesis.
(b) Define respiration. What is meant by respiratory quotient.
(c) What is dormancy? Describe methods of breaking dormancy.
2 (a) Define ecology. Describe applications of ecology in detail.
(b) What is plant succession? Give detailed account of process of plant succession starting in a lake.
3 (a) Give an account of methods for reclamation of waterlogged soil.
(b) Write an essay on natural resources of Pakistan.
- (a) What is soil erosion? What are its causes? How we can control it?
(b) Environmental pollution is the result of Urbanization and industrializations. Comment. -
Write notes on the following:
(a) Plant Hormones (b) Vernalization and its significance (c) Food Web (d) Methods of Sampling vegetations -
Describe the structure and functions of following cell organelles. Draw diagram where necessary:
(a) Mitochondria (b) Cell Wall (c) Golgi Bodies (d) Endoplasmic reticulum. (e). Ribosomes -
(a) What do you know about theory of natural selection.
(b) What is mutation? Describe its different types?
(c) Give an account of crossing over and Polyploidy.
Compulsory Question
- Write only the correct answer in the Answer Book. Do not reproduce the question.
(1) The membrane of vacuole is known as:
(a) Tonoplast (b) Chromoplast (c) Leucoplast (d) None of these
(2) The RNA which helps in.decoding of triplet codon is known as:
(a) r RNA t RNA (c) m RNA (d) None of these
(3) Transfer of material from higher concentration to lower concentration across semipermeable membrane is called:
(a) mass flow (b) Diffusion (c) Osmosis (d) None of these
(4) Loss of water in the form of vapours from living surface of plants is termed as:
(a) Evaporation (b) Sublimation (c) Evapotranspiration (d) None of these
(5) The movement of material within the plant body is known as:
(a) absorption (b) ascent of sap (c) Translocation (d) chemotropism
(6) The oxygen produced during photosynthesis comes from:
(a) air (b) water (c) CO2 (d) ATP
(7) The study of plant community is called:
(a) Ecology (b) Autecology (c) Plant geography(d) None of these
(8) The bending Movement of plant in response to light is known as:
(a) Thigmotropism (b) transmotropism (c) phototropism (d) None of these
(9) The occurrence of vegetation in layers is known as:
(a) Pattern (b) Stratification (c) Scarification (d) Physiognomy
(10) The plants which prefer to grow in moderate habitats are called as:
(a) Xerophytes (h) Hydrophytes (c) I lel iophytcs (d) None of these
(11) A particular place where the organism lives is termed as:
(a) environment (b) Nich (c) Habitat (d) None of these
(12) Pioneer Species of xerosere are:
(a) Crustose lichens (b) Foliose lichens (c) Fungi (d). Grasses
(13) The strip of vegetation planted to check the velocity of wind is called as:
(a) Timberline (b) flag formation (c) Shaer belt (d) None of these
(14) The factors which are concerned with soil are called as:
(a) Climatic factor (b) Edaphic factors (c) Topographic factors (d) Physiographic factors
(15) The chromosomes are composed of:
(a) Protein (b) DNA (c) Protein and DNA (d) None of these
(16) Test cross is a cross between:
(a) F1 and F1 (b) F1 and F2 (c) F1 and double recessive (d) None of these
(17) The colorless plastids are known as:
(a) Leucoplast (b) Chloroplast (c) Chromoplast (d) None of these
(18) Genes are located on:
(a) Nucleus (b) DNA (c) Ribosomes (d) Chromosomes
(19) Division of Nucleus is termed as:
(a) cytokinesis (b) Karyokinesis (c) Karyotype (d) None of these
(20) The cell organelle on which ribosomes arc present are called:
(a) Rough ER (b) Smooth E.R. (c) Cytoplasm (d) None of these