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✅Very important points - Human Reproduction 🌟Uterus also called womb. 🌟 Longest unstripped muscles of the body are found in the walls of uterus. (During pregnancy) 🌟 Clitoris is a homologous to the penis in the male. 🌟 Bartholin Glands : It is homologous to Cowper's gland of male 🌟 A functional mammary gland is characteristic of all female mammals. 🌟 The milk produced during the initial few days of lactation is called colostrum which contains antibodies (IgA) absolutely essential to develop resistance for the new-born babies. ⚡️ Liberation of sperms from Sertoli cells of seminiferous tubules is called spermiation. ⚡️ Liberation of sperms from testes is called semination. ⚡️ Liberation of sperms from body of male is called ejaculation . ⚡️ Mammalian sperms are transfered to vagina of female by the process called insemination. ⚡️ In 1 ml of semen, 20 to 120 millions of sperms are present in human being. ⚡️ Leydig's cells mature at 10 yrs. of age. ⚡️ In humans (and most vertebrates), the first polar body does not undergo meiosis II. ⚡️ The first polar body is, therefore, formed merely to get rid of unwanted chromosomes. ⚡️ 65-74 days are required to complete the cycle of spermatogenesis in human being. 🎖Click Here To Join Main Channel🎖

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Important terms in Biology for NEET l ➖ DNA: Deoxyribonucleic acid, a molecule that carries genetic information. ➖ RNA: Ribonucleic acid, a molecule that plays a key role in protein synthesis. ➖ Protein: A macromolecule made up of amino acids that carries out a variety of functions in the cell. ➖ Enzyme: A type of protein that catalyzes chemical reactions in the cell. ➖ Cell membrane: The thin, flexible layer that surrounds all cells and regulates the movement of molecules in and out of the cell. ➖ Mitosis: The process by which a single cell divides into two identical daughter cells. ➖ Meiosis: The process by which cells divide to produce gametes (sperm and eggs), each with half the number of chromosomes as the parent cell. ➖ Gene: A segment of DNA that codes for a specific protein or trait. ➖ Allele: One of two or more alternative forms of a gene. ➖ Mutation: A change in the DNA sequence that can result in altered gene function or the creation of new alleles. ➖ Natural selection: The process by which individuals with advantageous traits are more likely to survive and reproduce, leading to the evolution of populations over time. ➖ Adaptation: A trait or characteristic that increases an organism's fitness in its environment. ➖ Photosynthesis: The process by which green plants convert sunlight into energy in the form of organic compounds. ➖ Cellular respiration: The process by which cells convert organic compounds into energy in the form of ATP. ➖ Ecosystem: A community of living and non-living things that interact with each other and their environment. ➖ Homeostasis: The ability of organisms to maintain a stable internal environment in the face of changing external conditions. ➖ Evolution: The process by which species change over time as a result of genetic variation and natural selection. ➖ Ecology: The study of the interactions between living organisms and their environment. ➖ Biotechnology: The use of living organisms or their products to develop new products or processes. ➖ Epidemiology: The study of the distribution and determinants of health and disease in populations. ➖ Chromosome: A structure made of DNA and protein that carries genetic information. ➖ Cytoplasm: The gel-like substance inside a cell that contains organelles and other cell components. ➖ Organelle: A specialized structure within a cell that performs a specific function. ➖ Nucleus: The control center of a cell that contains the cell's DNA. ➖ Ribosome: The site of protein synthesis in a cell. ➖ Mitochondria: The organelles responsible for producing ATP through cellular respiration. ➖ Chloroplast: The organelles in plant cells responsible for photosynthesis. ➖ Cytoskeleton: The network of protein filaments that give a cell its shape and allow for movement. ➖ Endoplasmic reticulum: A network of membranes in the cytoplasm that is involved in protein and lipid synthesis. ➖ Golgi apparatus: An organelle that modifies, sorts, and packages proteins for secretion or transport. ➖ Lysosome: An organelle that contains enzymes for breaking down and recycling cellular waste. ➖ Vacuole: A membrane-bound organelle that stores materials such as water, nutrients, and waste products. ➖ ATP: Adenosine triphosphate, the molecule that carries energy within cells. ➖ Aerobic respiration: The process of producing ATP in the presence of oxygen. ➖ Anaerobic respiration: The process of producing ATP in the absence of oxygen. 🎖Click Here To Join Main Channel🎖

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Group 13 Elements (Boron Group): Includes boron (B), aluminum (Al), gallium (Ga), indium (In), and thallium (Tl). Boron is a metalloid with unique properties and forms covalent compounds. Aluminum is widely used in industries due to its lightweight and corrosion-resistant nature. Gallium is a metal with a low melting point, used in semiconductors and LED technology. Group 14 Elements (Carbon Group): Includes carbon (C), silicon (Si), germanium (Ge), tin (Sn), and lead (Pb). Carbon is the basis of organic chemistry and has diverse allotropes, including diamond and graphite. Silicon is a significant component of semiconductors and plays a vital role in modern electronics. Group 15 Elements (Nitrogen Group): Includes nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). Nitrogen is essential for life and exists as diatomic molecules in the atmosphere. Phosphorus is crucial for biological processes and is used in fertilizers and detergents. Group 16 Elements (Oxygen Group/Chalcogens): Includes oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and polonium (Po). Oxygen is vital for respiration and combustion processes. Sulfur is widely used in the chemical industry and exists as elemental sulfur and various sulfide compounds. Group 17 Elements (Halogens): Includes fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Halogens are highly reactive nonmetals and exist as diatomic molecules in their elemental form. Chlorine is widely used as a disinfectant, and iodine is used in antiseptics. Group 18 Elements (Noble Gases): Includes helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Noble gases have full valence electron shells, making them stable and unreactive. Helium is used in balloons and as a coolant in various applications. Group 16, 17, and 18 Compounds: Students should know the preparation, properties, and uses of common compounds like sulfuric acid, hydrochloric acid, ozone, hydrogen peroxide, and ammonia. General Trends in p-Block Elements: Understanding periodic trends like atomic size, ionization energy, electronegativity, and electron affinity within the p-block elements. Important Compounds: Learn about important compounds like borax, boron trifluoride, silicones, phosphine, hydrogen halides, carbon dioxide, sulfur dioxide, etc. Allotropes and Applications: Understanding the various allotropes of carbon (diamond, graphite, fullerene) and their applications in technology. 🎖Click Here To Join Main Channel 🎖

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𝗣𝗟𝗨𝗦 𝗗𝗜𝗚𝗜𝗧𝗔𝗟 𝗡𝗢𝗧𝗘𝗦 𝗥𝗜𝗧𝗨 𝗥𝗔𝗧𝗧𝗘𝗪𝗔𝗟 ➖➖➖➖➖➖➖➖➖➖ CLASS XI BIOLOGY NOTES 💥💥💥💥💥💥💥💥💥💥💥 ◾️CHAPTER 01 ◾️CHAPTER 02 ◾️CHAPTER 03 ◾️CHAPTER 04 ◾️CHAPTER 05 ◾️CHAPTER 06 ◾️CHAPTER 07 ◾️CHAPTER 08 ◾️CHAPTER 09 ◾️CHAPTER 10 ◾️CHAPTER 11 ◾️CHAPTER 12 ◾️CHAPTER 13 ◾️CHAPTER 14 ◾️CHAPTER 15 ◾️CHAPTER 16 ◾️CHAPTER 17 ◾️CHAPTER 18 ◾️CHAPTER 19 ◾️CHAPTER 20 ◾️CHAPTER 21 ◾️CHAPTER 22 ━━━━━━━━━━━━━━━━━━━━ CLASS XII BIOLOGY NOTES 💥💥💥💥💥💥💥💥💥💥💥 ◾️CHAPTER 01 ◾️CHAPTER 02 ◾️CHAPTER 03 ◾️CHAPTER 04 ◾️CHAPTER 05 ◾️CHAPTER 06 ◾️CHAPTER 07 ◾️CHAPTER 08 ◾️CHAPTER 09 ◾️CHAPTER 10 ◾️CHAPTER 11 ◾️CHAPTER 12 ◾️CHAPTER 13 ◾️CHAPTER 14 ◾️CHAPTER 15 ◾️CHAPTER 16 ━━━━━━━━━━━━━━━━━━━━ ♦️BIOLOGY SHORT NOTES♦️ ◾️CLASS XI ◾️CLASS XII 🌟Click on the chapter name for the notes. 🌟Share this notes list ━━━━━━━━━━━━━━━━━━━━

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