Akm bio-gyani : biology teacher blogs

Class 11th biology chapter 1 The Living World Full chapter notes  Scrol down to Download link 🔗  What is 'Living' ? 'Living' is something that is alive, something that can grow, move, reproduce, respire and carry out various cellular activities. When it comes to the humans, it is all the more difficult to define the living state. We observe patients lying in the coma in hospitals virtually supported by the machines which replace heart and lungs. The patient has no self consciousness. Are such patients who never come back to normal life, living or non-living?  Such person exhibit a complete absence of wakefulness and is unable to consciously feel, speak, hear or move . Such a person is called brain dead but as the body system is functioning, the person is considered as living. Biodiversity   The Diversity in the living world or biodiversity is the occurrence of the variety of life forms. Each different kinds of plant, animal or microorganisms represents a...

Digestion: The Intricate Journey Within the Human Body Introduction Digestion is a remarkable process that occurs within the human body, allowing us to extract vital nutrients from the food we consume. From the moment food enters our mouths to its final journey through the digestive system, numerous organs and processes work together harmoniously. In this comprehensive blog, we will explore the intricacies of digestion, unraveling the fascinating mechanisms that enable our bodies to break down and absorb nutrients from the foods we eat. Join us on this journey through the digestive system, where we will discover the marvels of the human body's ability to transform food into energy. The Mouth: Where Digestion Begins  Our journey commences in the mouth, where digestion begins with the process of mastication. Through the actions of the teeth, tongue, and salivary glands, food is broken down into smaller pieces, forming a bolus. Saliva, with its enzymes, initiates the chemical breakdow...

The NCERT Solutions for Class 8 Science Chapter 9 are very helpful for students who want to score well in their exams. The solutions provide a clear and concise explanation of all the concepts covered in the chapter. The solutions are prepared by our experts keeping in mind the latest CBSE curriculum and providing detailed and easy-to-understand explanations for all the concepts discussed in the chapter. Facts the Matter • The process of reproduction is not essential for the survival of an individual but reproduction is essential for the continuation of a species. • Modes of Reproduction :  Like plants, animal also reproduce by  (i) Sexual reproduction and  (ii) Asexual reproduction.     Sexual Reproduction :  The type of reproduction beginning from the fusion of male and female gametes is known as sexual reproduction. In this process of sexual reproduction, a male and a female gamete (reproductive cells) fuse to form a single cell called Zy...

 CBSE Class 12 Biology Revision Notes Chapter 5 Principles of Inheritance and Variation Genetics Genetics is the study of principles and mechanism of heredity and variation. Gregor Johann Mendel is known as ‘father of Genetics’. Inheritance  Inheritance is the process by which characters are passed on from parent to progeny. It is the basis of heredity. Variations Variation is the degree by which progeny differ from their parents. Variation may be in terms of morphology, physiology, cytology and behavioristic traits of individual belonging to same species. Variation arise due to- -Reshuffling of gene/chromosomes. -Crossing over or recombination -Mutation and effect of environment. Mendel’s Law of Inheritance:  Mendel conducted hybridization experiments on garden pea (Pisum sativum) for seven years and proposed the law of inheritance in living organisms. Selection of pea plant:  The main reasons for adopting garden pea (Pisum sativum) for experiments by Me...

Introduction  In this chapter, we delve into the fundamental aspects of control and coordination in living organisms. Exploring the intricate mechanisms that enable organisms to maintain harmony and adapt to their environment. From nervous systems to hormonal regulation, we uncover the vital processes governing life's dynamic equilibrium. Receptors:  Receptors are the specialized tips of the nerve fibres that collect the information to be conducted by the nerves.Receptors are in the sense organs of the animals. These are classified as follows : Phono-receptors: These are present in inner ear for sound Photo-receptors: These are present in the eye to respond to the light. Thermo-receptors: These are present in skin for heat/cold. Olfactory-receptors: These are present in nose for recieving smell Gustatory-receptors: These are present in the tongue for teste detection. Nervous System:  The nervous system is composed of specialized tissues, called nervous tissue. The nerve c...

" Human Reproduction" Human reproduction is the process by which new human beings are created. It involves the union of a sperm and an egg through fertilization, leading to the development of an embryo and, ultimately, the birth of a baby. It is a remarkable and vital aspect of the continuation of our species. How  do  humans reproduces ? Humans reproduce through sexual reproduction. The male reproductive system produces sperm, while the female reproductive system produces eggs. During sexual intercourse, sperm is ejaculated into the vagina and travels through the cervix and uterus to reach the fallopian tubes. If an egg is present in the fallopian tube, fertilization can occur, resulting in the formation of a zygote. The zygote then implants into the uterus, where it develops into an embryo and eventually a fetus. After a gestation period of around nine months, the baby is born through labor and delivery. The human reproduction takes place by means of male and ...