ICSE Class 10 Biology Important Topics 2025 and Usually Difficult, Confusing Concepts

ICSE Class 10 Biology Important Topics 2025: CISCE will conduct the ICSE Class 10 Biology 2025 exam on March 24, 2025. During the last minute preparation, the candidates are advised to refer to the ICSE 10th Biology important topics, so that they can expect to get the maximum questions from those topics. It will in turn help them to obtain a higher score in the ICSE Class 10 Biology exam. Based on the previous years’ question papers pattern, the most important topics for the ISC Class 10 Biology exam have been analysed. For instance, “Human Anatomy and Physiology” is assumed to be the most important topic of the ICSE 10th Biology exam. 

ICSE Class 10 Biology Important Topics 2025

Find out the ICSE Class 10 Biology important topics and their estimated marks here in the following section:

• Human Anatomy and Physiology: 28 marks
• Plant Physiology: 16 marks
• Basic Biology: 12 marks
• Pollution: 12 marks
• Population: 6 marks
• Human Evolution: 6 marks

ICSE Class 10 Biology Difficult Topics 2025

Here the candidates can find out the most difficult ICSE Class 10 Biology topics 2025 in the following section:

• Evolution of man, industrial melanism
• Expansion of NADP 
• Identifying the odd term and mentioning the category of others from terms related to circulatory system
• Identification of dominant and recessive alleles of a trait
• Difficulty in answering terms like ovulation, parturition, corpus luteum and chemotropism
• Efficiency of RBCs in transporting oxygen
• Defects of eye and formation of image
• Observation of colour change during starch test for experiments on photosynthesis
• Number of cranial nerves and spinal nerves
• Structural differences between afferent arteriole and efferent arteriole, artery and vein
• Exact location of pericardium
• Definition of terms - hormone, Thigmotropism, Diapedesis, Ultrafiltration, mixed nerve
• Parts of the ear responsible for static equilibrium and dynamic equilibrium
• Limitations of using a Potometer

ICSE Class 10 Biology Confused Topics 2025

Here the candidates can find out the most confused ICSE Class 10 Biology topics 2025 in the following section:

• Location of Bicuspid valve, left and right sides of the heart
• Limitations of potometer
• Endocrine glands concerned for diabetes mellitus and diabetes insipidus
• Centromere and centrosome
• Graafian follicle and corpus luteum
• Function of cerebrum and cerebellum
• Diameter of afferent arteriole and efferent arteriole
• Colour change of leaf after starch test
• Tubectomy and vasectomy
• Haploid and diploid number of chromosomes
• Position of chromosomes / chromatids in different phases of mitosis

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