BSc Life Science 1st Year Notes PDF Download

BOT-DSC-1: Plant Diversity & Systematics

Botany starts with the diversity of plants and microbes and how they are related, then moves into how plants are named and classified. Nine units, with the lecture hours in brackets:

• Unit 1, Diversity of Life (1): domains of life: Eubacteria, Archaea and Eukaryotes.
• Unit 2, Microbes (4): viruses, lytic and lysogenic cycles, bacterial structure, L-forms and Mycoplasma, genetic recombination.
• Unit 3, Algae (3): blue-green, green, brown and red algae, with Nostoc, Volvox and Spirogyra.
• Unit 4, Fungi (3): Rhizopus, Penicillium and Agaricus, plus a general account of lichens.
• Unit 5, Bryophytes, Pteridophytes and Gymnosperms (6): Marchantia, Funaria, Pteris and Pinus (morphology only).
• Unit 6, Angiosperms (2): diagnostic features, structure of a flower, types of inflorescence.
• Unit 7, Systematics (1): aims, components, nomenclature, phylogeny and biosystematics.
• Unit 8, Systematics in Practices (7): taxonomic hierarchy, botanical nomenclature rules, type method, principle of priority.
• Unit 9, Systems of Classification (3): Bentham and Hooker, Engler and Prantl, and the APG system.

How to prepare: Units 5 and 8 carry the most lectures (6 and 7), so give them the most time. For Units 3 to 5, practise drawing and labelling the life cycles, since the practical syllabus names the same genera. Learn the nomenclature rules in Unit 8 as short numbered points and revise them often.

CHEM-DSC-01: Basic Concepts of Organic Chemistry

Chemistry builds the ground rules of organic chemistry, then applies them to reactions. Only three units, but the last one is large:

• Unit 1, Fundamentals of Organic Chemistry (5): electronic effects, reactive intermediates and their stability, acidity and basicity.
• Unit 2, Stereochemistry (7): flying wedge, Newman, sawhorse and Fischer projections, chirality, optical and geometrical isomerism, R/S and E/Z naming, conformations of ethane, butane and cyclohexane.
• Unit 3, Types of Organic Reactions (18): electrophilic and nucleophilic addition, nucleophilic substitution and elimination (SN1, SN2, E1, E2), electrophilic aromatic substitution, reactive intermediates and rearrangements.

How to prepare: Unit 3 is 18 of the 30 lectures, so build your plan around it. Write each mechanism out step by step instead of only reading it. For Unit 2, practise converting between Fischer, Newman and sawhorse drawings. Finish Unit 1 first, because the rest depends on it.

ZOO-DSC-01: Diversity of Animals

Zoology tours the animal kingdom from single-celled organisms to chordates, with an emphasis on how structure and function differ across groups. Four units:

• Unit I, Introduction (2 hours): five kingdom classification, general characters of Animalia, taxonomic hierarchy, binomial nomenclature.
• Unit II, Protista to Pseudocoelomates (9): locomotion in Protozoa, canal system in Porifera, polymorphism in Cnidaria, life cycles of Taenia solium and Ascaris lumbricoides.
• Unit III, Coelomates (9): metamerism in Annelida, vision in Arthropoda, insect metamorphosis, torsion and detorsion in Gastropoda, pearl formation, water vascular system in Asteroidea.
• Unit IV, Chordates (10): protochordates and chordates, retrogressive metamorphosis, osmoregulation, parental care, flight adaptations, bird migration, biting mechanism in snakes, origin of mammals.

How to prepare: Most topics in Units II to IV are specific named processes or life cycles, so make a short labelled diagram for each one. The practical syllabus lists museum specimens to identify and classify, so revise the theory and the specimens together.

Planning Semester 1 Across Three Subjects

All three papers carry 4 credits, so none of them deserves to be left for last. Rotate between the subjects through the week instead of finishing one at a time, read each unit in the syllabus before you open the notes, and keep a fixed day for practical records. Previous year questions and practical files for Semester 1 are coming soon, and the Life Science Telegram group is where we will announce them.