ICSE Class 11 Biology paper is of 3 hours duration and divided into two parts. Here is the ICSE Class 11 Biology Syllabus by Extramarks. Extramarks has prepared study materials for ICSE Class 11 Biology Syllabus to make learning easy and interesting for the students. Using the study materials prepared by Extramarks for ICSE Class 11 Biology Syllabus can help students get a better grasp of the subject and score high marks in their exams.

Part I consists of compulsory short answer questions, testing knowledge, application, and skills relating to elementary/fundamental aspects of the entire syllabus.

Part II is divided into three sections A, B, and C.

SECTION A
1. Diversity of Life
(i) Taxonomy and phylogeny and the three domains of life
(ii) Five-kingdom classification: salient features, characteristics, and examples.


SECTION B
2. Plant Physiology
(i) Mineral nutrition: macronutrients and micronutrients (symptômes of role and deficiency); essential criteria for elements, hydroponics; nutrient nitrogen in plants.

(ii) Plant growth: growth phases, growth rate, growth measurement, growth factors, growth regulator role, 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: types of plant tissues: Meristematic: classification of Meristematic tissues.Permanent tissues: structure and function of simple tissues (parenchyma, collenchyma, and sclerenchyma) and complex tissues (xylem and phloem), types of vascular tissues.

(ii) Animal tissue: epithelial; connective; muscular; nervous (location, structure, and function).

(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, human heart structure, cardiac cycle, systemic and pulmonary circulation, portal system, arterial blood pressure, origin and conduction of heartbeats, blood vessels (structure with the help of diagrams and adaptation), lymphatic system. ABO groups, coagulation of blood. Disorders of the Circulatory system.

(vii) Endocrine System (human): hormones of pituitary, pineal, thyroid, parathyroid, pancreas, adrenal glands and gonads; mechanism of hormone action; effect of hyposecretion and hypersecretion, feedback mechanism.

(viii) Nervous System (human): Central, autonomic and peripheral, the structure of the brain and spinal cord, reflex action, the transmission of nerve impulse, saltatory conduction; sense organs (eye and ear). Receptors (mechanoreceptor, chemoreceptor, photoreceptor, and thermoreceptors).

(ix) Locomotion: joints, skeletal muscle structure, sliding-filament theory of muscle contraction, red and white muscles, summation, tétanus and rigor mortis.
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