Leaves
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The parts of a leaf, simple and compound leaves, and the two types of venation, with the exceptions to each.
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Class 11
The Living World
Biological Classification
Plant Kingdom
Animal Kingdom
Morphology of Flowering Plants
Anatomy of Flowering Plants
Structural Organisation in Animals
Cell: The Unit of Life
Biomolecules
Cell Cycle and Cell Division
Photosynthesis
Respiration in Plants
Plant Growth and Development
Body Fluids and Circulation
Breathing and Exchange of Gases
Excretory Products
Locomotion and Movement
Neural Control
Chemical Coordination
Class 12
Sexual Reproduction in Flowering Plants
Human Reproduction
Reproductive Health
Principles of Inheritance
Molecular Basis of Inheritance
Evolution
Human Health and Diseases
Microbes in Human Welfare
Biotechnology Principles
Biotechnology Applications
Organisms and Populations
Ecosystem
Biodiversity and Conservation
Lessons
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Parenchyma
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Parenchyma is a fundamental plant tissue consisting of versatile, living cells with thin walls. Found in leaves, stems, roots, and fruits, parenchyma cells are crucial for photosynthesis, storage, and tissue repair. Their ability to divide and differentiate supports plant growth and development.
Onion | Allium cepa
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The onion plant (Allium cepa) is a biennial herb cultivated for its edible bulb, composed of fleshy, layered leaves. Rich in vitamins and minerals, onions are widely used in culinary dishes worldwide. The plant’s sulfur compounds contribute to its distinctive flavor and health benefits, including antioxidant properties.
Non-Disjunction of Chromosomes
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Non-disjunction of chromosomes is a genetic mishap during cell division, where chromosomes fail to separate properly. This error can lead to disorders like Down syndrome, where an extra chromosome 21 is present. Non-disjunction can occur in meiosis or mitosis, resulting in cells with abnormal chromosome numbers, affecting an organism’s development and health.
Neurons
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Neurons are specialized nerve cells essential for transmitting electrical signals in the nervous system. Comprised of a cell body, dendrites, and an axon, neurons facilitate communication between the brain and body. This intricate network underpins all neural functions, including movement, sensation, and cognition
Mitosis
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Mitosis is the process of cell division that ensures equal distribution of chromosomes to two daughter cells. It involves stages: Prophase, Metaphase, Anaphase, and Telophase. Each phase is crucial for accurate chromosome replication and separation, maintaining genetic stability and enabling growth, repair, and development in multicellular organisms.
Meiosis
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Meiosis is a specialized cell division process that reduces the chromosome number by half, producing four unique gametes. It involves two sequential stages: Meiosis I and Meiosis II. This genetic shuffling increases diversity, which is essential for sexual reproduction and contributes to the genetic variation observed in offspring.
Mango
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The mango plant and its drupe fruit: its classification, the layers of the fruit wall, other plant features, and its link to polyembryony.
Maize
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Maize, or Zea mays, is a monocot plant from the Poaceae family, producing unisexual flowers on the same plant, and is notable for its unique caryopsis fruit where the seed coat and fruit wall are fused.
Life Cycle of Pteridophytes
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Pteridophytes, also known as vascular amphibians, exhibit a diplo-haplontic life cycle, where the dominant sporophyte is well-differentiated with true roots, stems, and leaves, while the reduced gametophyte is heart-shaped and photosynthetic.
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