The Biology Paper of Class 11 is of 3 hours and is divided into two parts.
Part I consists of mandatory short answers to questions, testing of knowledge, application and skills related to the basic or fundamental aspects of the entire syllabus.
Part II is divided into three sections A, B and C. Students are required to answer two out of three questions from Section A two out of three questions from Section B and two of the three questions from Section C. A total of six questions are therefore to be answered in Part II.
So six questions are to be answered in Part II.
SECTION A
1. Diversity of Life
(i) Five-kingdom classification: salient features, characteristics and examples.
SECTION B
2. Plant Physiology
(i) Mineral nutrition: macronutrients and micronutrients (role and deficiency symptoms); criteria for the essentiality of elements, hydroponics; nitrogen nutrition in plants.
(ii) Plant growth: phases of growth, growth rate, measurement of growth, factors affecting growth, the role of growth regulators, seed dormancy and germination, apical dominance, senescence and abscission.
(iii) Photomorphogenesis in plants.
3. Multicellularity: the structure and function of plants and animals
(i) Plant Tissues: Plant tissues: types of plant tissues: Meristematic: classification of Meristematic tissues. Permanent Tissues: structure and function of simple tissues and complex tissues (xylem and phloem); vascular bundles of the types of bundles.
(ii) Animal tissue (location, structure and function): epithelial; connective; muscular.
(iii) Nutrition (human): Calorific value of carbohydrates, proteins and fats, Organs of the digestive system (histology of individual organs not required), digestive process and disorders of the digestive system.
(iv) Respiration (human): Organs of the respiratory system, breathing mechanism (inspiration and expiration), pulmonary gas exchange, transport of respiratory gases, pulmonary air volumes and lung capacities. Disorders of the respiratory system.
(v) Circulation: closed and open vascular systems, the structure of human heart, cardiac cycle, systemic and pulmonary circulation, portal system, arterial blood pressure, origin and conduction of heartbeat, blood vessels (structure with the help of diagrams and adaptation), lymphatic system. ABO groups, coagulation of blood. Disorders of the Circulatory system.
(vi) Excretion: ammonotelia, uricotelia, human kidney (L.S.), nephrogenic structures, skin and lung operation, urine formation physiology, counter-current system; functionalities of the skin and lungs; physiology of urine formation, counter-current system; functions of the kidney; homeostasis. Disorders of the excretory system.

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