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ANATOMY OF FLOWERING PLANTS

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  What is Plant Anatomy? Plant anatomy is the study of internal structure and organization of tissues in plants. It helps in understanding: Functional adaptation Transport system Growth patterns Tissue Organization in Flowering Plants Flowering plants have three major tissue systems :  Epidermal Tissue System Components: Epidermis Single layer of compact cells No intercellular spaces Covered by cuticle (except roots) Cuticle Made of cutin Prevents water loss Stomata Present mainly on leaves Composed of guard cells Regulate: Gas exchange Transpiration Root hairs Extensions of epidermal cells Increase surface area for absorption Trichomes (in stem) Hair-like structures Protection + reduce transpiration  Functions: Protection Water conservation Gas exchange 🌿 B. Ground Tissue System  Types of Ground Tissue: 1. Parenchyma Living cells, thin cell wall Large vacuole Functions: Storage Photosynthesis ( chlorenchyma ) Air storage ( aerenchyma ) 2. Collenchyma Living cell...

Exploring the Wonders of The Living World: A Journey Through Nature's Diversity and Complexity. ONE SHOT NOTES

The living world is a complex and fascinating topic that encompasses all living organisms on Earth. From the smallest bacteria to the largest mammals, every living thing is part of a vast and interconnected web of life. Understanding the living world is essential for many reasons, including the conservation of biodiversity, the development of new medicines and technologies, and the exploration of our own origins. In this blog post, we will explore the characteristics of life, the classification of living organisms, the importance of biodiversity, the interactions among living organisms, and much more. By the end of this post, you will have a deeper appreciation for the living world and the role it plays in our lives. The living world refers to all living organisms on Earth, including animals, plants, fungi, bacteria, and archaea. It is a vast and diverse system that is characterized by the ability to grow, develop, reproduce, and adapt to changing environments. The living world is cons...

25+ Fascinating Facts About Cell Division and Reproduction

 Cell division is the process by which a cell reproduces and creates new cells. The two main types of cell division are mitosis and meiosis. Mitosis is used for the growth and repair of body tissues, while meiosis is used for sexual reproduction. Mitosis results in the production of two identical daughter cells, while meiosis results in the production of four non-identical daughter cells. Mitosis has four phases: prophase, metaphase, anaphase, and telophase. Meiosis has two rounds of division: meiosis I and meiosis II, each with its own set of phases. Chromosomes are the structures that carry genetic information in cells. The number of chromosomes in a cell varies depending on the species. Humans have 46 chromosomes in each of their cells, except for sperm and egg cells which have 23. Chromosomes are made up of DNA and proteins. DNA is the genetic material that carries instructions for the development and function of all living organisms. During cell division, the DNA in the chromo...

Chemotherapy: A Comprehensive Guide

 Chemotherapy is a type of cancer treatment that uses drugs to destroy cancer cells. It is one of the most common treatments for cancer and can be used alone or in combination with other treatments such as radiation therapy and surgery. This blog will provide a comprehensive guide to chemotherapy, including how it works, its benefits, and potential side effects. How Chemotherapy Works Chemotherapy works by killing rapidly dividing cancer cells. However, because chemotherapy drugs also affect normal cells that divide rapidly, such as hair follicles and the cells lining the digestive tract, it can cause side effects. The specific drugs used, the dose, and the length of treatment will vary based on the type and stage of cancer being treated. Benefits of Chemotherapy Chemotherapy can be a highly effective treatment for cancer. It can shrink tumors, slow the spread of cancer, and even cure the disease in some cases. It can also be used to control symptoms and improve quality of life for...

PROTEIN SEQUENCING

 Protein sequences can be determined using various techniques, including: Edman degradation   a chemical method used to determine the sequence of amino acids in a protein. It involves the sequential removal of amino acids from the N-terminus of a protein and the identification of each amino acid through a series of reactions. The basic principle of Edman degradation is to use a chemical reagent to selectively remove the N-terminal amino acid from a protein and to then identify the removed amino acid through a series of reactions. This process is then repeated for each subsequent N-terminal amino acid until the entire protein sequence has been determined. The first step in Edman degradation is the treatment of the protein with a reagent, such as phenylisothiocyanate (PITC), which reacts specifically with the N-terminal amino acid of the protein. The reaction between PITC and the N-terminal amino acid results in the formation of a phenylthiocarbamyl (PTC) derivative. The PT...

nervous system

  The nervous system in humans is a complex and sophisticated network of neurons and supportive cells that coordinate and regulate the body's functions. It consists of the central nervous system (CNS), which includes the brain and spinal cord, and the peripheral nervous system (PNS), which consists of nerves that extend from the CNS to the rest of the body. The CNS is the center of all nervous system activity, receiving and processing information from the sensory nerves in the PNS and directing the actions of the muscles through the motor nerves. The brain is the primary organ of the CNS and is responsible for processing information, making decisions, and controlling movement. The PNS is divided into two branches: the somatic and autonomic nervous systems. The somatic nervous system is responsible for transmitting sensory information from the skin and joints to the CNS, as well as controlling voluntary movements of the skeletal muscles. The autonomic nervous system, on the other ha...

biotechnology class 12 2023

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1.Male sterility is widely used in crops such as maize, sunflower for hybrid production. Male sterile plants are created by introducing a gene encoding- (a) Barnase protein (b) TA29 (c) Barstar protein (d) Coat protein EXPLANATION: (a) Barnase gene was first introduced to produce male sterility in 1990. it is effective fertility restoration system in barstar. it is genetic and heritable. 2. Bodybuilders prefer to drink buffalo milk to build muscle mass. Determine the reason for this? (a) Easier to digest (b) Lower fat content (c) Higher calcium and phosphorus content (d) Balanced calorie source EXPLANATION: (c) buffalo milk has high-fat content, higher calcium and phosphorus content 3. An industrially important secondary metabolite which is used as a red pigment in lipsticks and dye for silk is obtained from- (a) Datura stramonium (b) Lithospermum erythrorhizon (c) Digitalis lanata (d) Coptis japonica EXPLANATION: (b) Lithospermum erythrorhizon commonly known as purple groomwell, red ...