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 Class 11 Biology Plant Physiology Notes PDF | CBSE & NEET NEET Biology Notes ,( Line-by-Line Explanation) Plant Physiology in Flowering Plants – Understanding Photosynthesis, Respiration, Growth, and Environmental Factors (CBSE Class 11 Biology) Introduction to Plant Physiology Original Line 1: "The description of structure and variation of living organisms over a period of time, ended up as two, apparently irreconcilable perspectives on biology." Easy Notes: Biology studies the structure (body form) and variation (differences) of living organisms. Scientists studied living organisms in two different ways . At first, these two ways looked very different (irreconcilable) . Irreconcilable = Difficult to combine or match. NEET Point: Biology has two major approaches to study life. Original Line 2: "The two perspectives essentially rested on two levels of organisation of life forms and phenomena." Easy Notes: These two approaches are based on t...

  Chemical Reactions and Enzymes – Easy Line-by-Line Notes (NEET Beginner Level) Chemical reactions and enzymes explained with simple diagrams for CBSE Class 11 Biology students. 1. What is a Chemical Reaction? A chemical reaction is a process in which old chemical bonds break and new bonds are formed . As a result, new substances (products) are produced. Example: Ba(OH)₂ + H₂SO₄ → BaSO₄ + 2H₂O NEET Point: Chemical reaction = Breaking + Formation of bonds . 2. Types of Changes in Chemical Compounds A. Physical Change Only the shape, size, or state changes. No chemical bonds are broken or formed. No new substance is produced. Examples Ice → Water Water → Water vapour Cutting paper Breaking glass Remember: Physical change = No new substance. B. Chemical Change Old bonds break and new bonds form. A new substance is produced. This process is called a chemical reaction . Examples Burning wood Rusting of iron Digestion of food Hydrolysis of starc...

  Easy NEET Notes – Biomolecules Types   CBSE Class 11 Biomolecules: Amino acids, lipids, and nucleic acids explained with clear diagrams for easy exam preparation. - Dr.Sanjaykumar Pawar  1. Proteinaceous Amino Acids What is an Amino Acid? Amino acids are the building blocks of proteins . Every amino acid contains: Amino group (–NH₂) Carboxyl group (–COOH) Hydrogen atom (H) R group (Side chain) → makes each amino acid different. R Group (Side Chain) The R group decides the type and properties of an amino acid. Examples: Glycine (Gly) → R = Hydrogen (H) → Simplest amino acid. Alanine (Ala) → R = Methyl group (–CH₃). Serine (Ser) → R = Hydroxymethyl group (–CH₂OH). NEET Tip: R group is responsible for the unique nature of every amino acid. Types of Amino Acids (Based on Amino & Carboxyl Groups) 1. Acidic Amino Acids Have more carboxyl (–COOH) groups than amino groups. Carry a negative charge. Example: Glutamic acid. Easy T...

 CBSE Class 11 Biology Classification Systems 5 Marks Answer  Evolution of Biological Classification Systems for CBSE Class 11 Biology - Dr.Sanjaykumar Pawar  Q1. Discuss how classification systems have undergone several changes over a period of time. [5 Marks] Answer The classification of living organisms has changed continuously over time. Initially, organisms were grouped based on simple observable features. As scientific knowledge and technology advanced, classification became more scientific and was based on cellular organization, mode of nutrition, evolutionary relationships, and molecular characteristics. The major stages in the evolution of classification systems are as follows: 1. Earliest Scientific Classification (Aristotle's System) Basis: Simple morphological characters. Classification: Plants were divided into: Trees Shrubs Herbs Animals were divided into: Enaima (animals with red blood) Anaima (animals without red blood) 2. Two-Kin...

  Mechanism of Hormone Action – Easy NEET Notes Introduction Hormones regulate different physiological activities of the body. Based on their chemical nature, hormones are divided into four groups. Types of Hormones 1. Peptide / Polypeptide / Protein Hormones Examples Insulin Glucagon Pituitary hormones Hypothalamic hormones Important Features Made up of amino acids. Water soluble. Cannot pass through cell membrane. Act through membrane-bound receptors. NEET Point These hormones use second messengers like: cAMP IP₃ Ca²⁺ 2. Steroid Hormones Examples Cortisol Testosterone Estradiol Progesterone Important Features Lipid soluble. Can easily pass through plasma membrane. Receptors are inside the cell. NEET Point They directly influence: Gene expression Protein synthesis 3. Iodothyronines (Thyroid Hormones) Examples T₃ (Triiodothyronine) T₄ (Thyroxine) Important Features Derived from amino acid tyrosine. Regulate metabolism and ...