1Medium15 marks
Give an account of distribution and economic importance of Bryophytes in India.
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56 questions from the UPSC 2018 examination.
56 questions
Give an account of distribution and economic importance of Bryophytes in India.
Define natural forests and mention the name of the forest type covering the maximum area in India. Discuss the major forest types in India as described by Champion and Seth.
Gray seed colour in peas is dominant over the white. In the following experiments, parents with known phenotypes but unknown genotypes produced the following progeny : Parents: (i) Gray x White -> Progeny: Gray 82, White 78; (ii) Gray x Gray -> Progeny: Gray 118, White 39; (iii) White x White -> Progeny: Gray 0, White 50; (iv) Gray x White -> Progeny: Gray 71, White 0; (v) Gray x Gray -> Progeny: Gray 90, White 0. Using the letter G for gray and g for white, give the genotype of each parent.
Floral morphology (Fructification) and L.S. of ovule of Cycadeoidea
Write an account of the following families with reference to floral formula and floral diagram. Give Botanical names of four important plant species belonging to each of the families and mention their uses: (i) Euphorbiaceae (ii) Asclepiadaceae (iii) Poaceae
Describe the role of xylem and phloem in secondary growth of plants.
Write notes on the following: (i) NPC system of classification of pollen grains (ii) Cytodifferentiation and its regulation
Discuss the role of cyclin dependent protein kinases in controlling the cell cycle Explain with the help of a diagram.
Describe with suitable diagram, the lac operon of bacterium E. Coli. Discuss the control mechanism of the operon which produces the enzymes necessary for catabolizing the lactose.
Discuss the essential components of a Botanical garden. Write the names of important Botanical gardens in India.
Explain the synthetic theory of organic evolution.
Write Botanical names and their families of plants yielding spices, drugs and insecticides and mention the parts used therein.
What is biodiversity ? Discuss the major strategies for the conservation of biodiversity.
Components of an ecosystem
What is Phosphorylation ? Differentiate between photophosphorylation and oxidative phosphorylation.
Describe the structure and function of Plasmodesmata.
Enumerate the different causes of heterosis.
Structure of mycoplasma and its importance
How are insect-resistant transgenic plants developed ? Which gene is used in this technology? Briefly explain the rationale of the technology.
Describe the process of protoplast isolation and mention the applications of protoplast culture.
Organelles bound by membranes in eukaryotic cells have originated from endosymbiosis at prokaryotic cells." Explain this statement with the help of some suitable diagrams.
Comment on salient features of Cordaitales.
Phytogeographical regions of India
Development of endosperm and its functions
Why is RNA considered as the first living molecule? Discuss its role in the origin of life.
Discuss the leaf anatomy of C3 and C4 plants.
Define plant community. Discuss the various analytical characters of plant community.
Water potential
Explain distinguishing characters of Dipterocarpaceae, Asteraceae and Orchidaceae.
Briefly describe the following terms and emphasize their applications: (i) Restriction endonucleases (ii) Mutation breeding (iii) Gene cloning
Briefly discuss the cellular function of mitochondria and endoplasmic reticulum with required diagrams.
Replication of plant viruses
Plant Quarantine
Write an account of defense structures in plants against pathogens.
Different types of Herbarium
Generation of Symmetric hybrids
Compare the systems of classifications proposed by Hutchinson and Cronquist with a note on their merits and demerits.
Comment on morphological nature of sporocarp in Marsilea.
Describe the role of micro-organisms in medicine and industry.
Spermocarp and Cystocarp
Explain the concept of multiple alleles with one example.
Describe the major types of embryos with suitable examples.
When statistical test is used to determine whether the observed progeny of a cross fits or differs from the expected values ? Name the test and briefly describe the steps involved.
How do plants monitor day length ? Discuss the various categories of plants based on their photoperiodic responses. What happens when the dark period is interrupted by night break and why ?
Describe the different types of stomata in dicots
Green ear disease of Bajra
Angular leaf spot of cotton
Define enzyme, prosthetic groups, coenzymes and isoenzymes. Discuss the mechanism of enzyme action.
Typification in plant nomenclature
Describe C3 pathway of CO2 fixation. Discuss the advantages that the C4 plants have over C3 plants.
Explain the importance of the following techniques: (i) FISH (ii) Molecular probe
What is ecological succession ? Discuss the various models describing the mechanism of succession.
Describe the male and female cones of Pinus
What is red data book ? Describe it. Discuss the various IUCN threat categories.
Briefly describe the different methods of gene transfer in plants.
Structure and importance of Lichens