- Sunlight is the primary energy source, captured by plants (producers) and passed through consumers and decomposers.
- Energy diminishes as it moves up the food chain due to heat loss.
- Decomposers recycle organic matter into inorganic nutrients, supporting plant growth.
- Nutrient cycling ensures the availability of essential elements like nitrogen and phosphorus.
- Living organisms rely on abiotic elements like air, water, and soil for survival.
- Biological activities, like respiration and decomposition, impact abiotic factors.
- Plants absorb nutrients from the soil, supporting primary productivity.
- Animals depend on plants for food and oxygen derived from photosynthesis.
- Decomposers maintain ecosystem balance by breaking down waste and dead matter.
- A constant interplay exists between biotic and abiotic components for ecosystem stability.
Topics
Reproduction in Lower and Higher Plants
- Reproduction
- Mode of Reproduction in Plant
- Asexual Reproduction in Plant
- Vegetative Reproduction
- Natural Vegetative Reproduction
- Artificial Vegetative Reproduction
- Sexual Reproduction in Flowering Plants
- Pre-fertilization in Plant: Structure and Events
- Pre-fertilization in Plant: Stamen (Male Reproductive Unit)
- Pre-fertilization in Plant: Microsporangium
- Structure of Microspore Or Pollen Grain
- Pre-fertilization in Plant: Pistil (Female Reproductive Unit)
- Pre-fertilization in Plant: Megasporangium
- Pre-fertilization in Plant: Formation of Embryo Sac
- Pollination
- Self Pollination (Autogamy)
- Cross Pollination
- Agents of Pollination
- Outbreeding Devices
- Pollen Pistil Interaction
- Fertilization Process
- Post Fertilisation in Plant: Structures and Events
- Development of Endosperm
- Post Fertilization in Plant: Development of Embryo (Embryogeny)
- Formation of Seed and Fruit
- Apomixis
- Parthenocarpy
- Polyembryony
- Kinds of Pollination
Reproduction in Lower and Higher Animals
- Reproduction
- Mode of Reproduction in Animal
- Asexual Reproduction in Animal
- Sexual Reproduction in Animals
- Human Reproduction
- The Male Reproductive System
- The Female Reproductive System
- Menstrual Cycle (Ovarian Cycle)
- Gametogenesis
- Fertilization in Human
- Embryonic Development in Human
- Implantation in Human
- Pregnancy in Humans
- Placenta (Growth) in Human
- Parturition (Birth) in Human
- Lactation in Human
- Reproductive Health
- Population Stabilisation and Birth Control
- Medical Termination of Pregnancy (MTP)
- Sexually Transmitted Diseases (STD)
- Infertility
- Gastrulation in humans
Inheritance and Variation
- Heredity or Inheritance
- Gregor Johann Mendel – Father of Genetics
- Genes and Genetic
- Mendelian Inheritance - Mendel’s Law of Heredity
- Back Cross and Test Cross
- Deviations from Mendel’s Findings
- Chromosomal Theory of Inheritance
- Chromosomes - The Carriers of Heredity
- Linkage and Crossing Over
- Autosomal Inheritance
- Sex Linked Inheritance
- Sex Determination
- Genetic Disorders
Molecular Basis of Inheritance
- Deoxyribonucleic Acid (DNA) and Its Structure
- The Genetic Material is a DNA
- Packaging of DNA Helix
- DNA Replication
- Protein Synthesis
- Regulation of Gene Expression
- Operon Concept
- Genomics
- Human Genome Project
- DNA Fingerprinting Technique
- Genetic Code
Origin and Evolution of Life
- Origin and Evolution of Universe and Earth
- Theories of Origin of Life
- Chemical Evolution of Life (Self-assembly Theory of the Origin of Life)
- Darwinism
- Mutation Theory
- Modern Synthetic Theory of Evolution
- Organic Evolution
- Hardy Weinberg’s Principle
- Adaptive Radiation
- Evidences for Biological Evolution
- Speciation
- Geological Time Scale
- Human Evolution
- Theories of Biological Evolution
Plant Water Relation
- Plant Water Relation
- Properties of Water
- Water absorbing organ
- Water Available to Roots for Absorption
- Means of Transport in Plants
- Concept of Imbibition
- Simple Diffusion
- Concept of Osmosis
- Osmotic Pressure
- Facilitated Diffusion
- Turgidity and Flaccidity (Plasmolysis)
- Active Transport
- Passive Transport
- Water Potential (ψ)
- Path of Water Across the Root
- Translocation of Water (Ascent of Sap)
- Transport of Mineral Ions
- Transport of Food
- Transpiration
- Types of Transpiration
- Structure of Stomatal Apparatus
- Significance of Transpiration
Plant Growth and Mineral Nutrition
- Plant Growth
- Phases of Plant Growth
- Conditions Necessary for Plant Growth
- Plant Growth Rate
- Plant Growth Curve
- Differentiation, De-differentiation, Re- Differentiation
- Plant Development
- Plant Plasticity
- Plant Hormones
- Types of Plant Hormones: Auxins
- Types of Plant Hormones: Gibberellins
- Types of Plant Hormones: Cytokinins
- Types of Plant Hormones: Ethylene
- Types of Plant Hormones: Abscisic Acid (ABA)
- Photoperiodism
- Vernalization (Yarovization)
- Plant Mineral Nutrition
- Nitrogen Cycle
Respiration and Circulation
- Respiration
- Organs of Respiratory Exchange
- Human Respiratory System
- Mechanism of respiration-Breathing
- Regulation of Breathing / Respiration
- Modified Respiratory Movements
- Disorders of Respiratory System
- Transportation in Living Organisms
- Circulation in Animals
- Types of Closed Circulation
- Blood Circulatory System in Human
- Composition of Blood: Plasma (The Liquid Portion of Blood)
- Composition of Blood: Red Blood Cells (Erythrocytes)
- Composition of Blood: White Blood Cells (Leukocytes)
- Composition of Blood: Blood Platelets (Thrombocytes)
- Function of Platelets - Clotting of Blood (Coagulation)
- Human Heart
- Working mechanism of human heart
- Blood Vessels
- Blood Pressure (B.P.)
- Electrocardiogram (ECG)
- Lymph and Lymphatic System
- Mechanism of respiration - Internal respiration
- Mechanism of respiration - External respiration
- Mechanism of respiration - Cellular respiration
Control and Co-ordination
- Control and Co-ordination
- Nervous System in Hydra
- Nervous System in Planaria (Flatworm)
- Neural Tissue
- Neuron (Or Nerve Cell) and Its Types
- Neuroglial Cells (Or Glial Cells)
- Human Nervous System
- Central Nervous System (CNS)
- The Human Brain - Forebrain
- The Spinal Cord
- Peripheral Nervous System (PNS)
- Sensory Receptors
- Human Eye
- Human Ear
- Disorders of Nervous System
- Chemical Coordination
- Human Endocrine System
- The Hypothalamus
- Pituitary Gland or Hypophysis Gland
- The Pineal Gland
- Thyroid Gland
- Parathyroid Gland
- Thymus Gland
- Adrenal Gland (Suprarenal Gland)
- Pancreas (Islets of Langerhans)
- Reproductive Glands (Gonads)
- Synapse - Properties of nerve fibres
- Synapse - Types of synapse
- Transmission of nerve impulse
- Generation of nerve impulse
- Reflex Action
- Autonomic Nervous System (ANS)
- Diffuse Endocrine Glands
Human Health and Diseases
- Defence System in Our Body: Immune System
- Immunity
- Types of Immunity
- Vaccination and Immunization
- Structure of Antibody
- Disease
- Protozoan Diseases
- Helminthic Diseases
- Bacterial Diseases
- Viral Diseases
- Fungal Diseases
- Vector Borne Diseases
- Cancer
- Adolescence
- Addiction
- Drug Abuse
Enhancement of Food Production
- Improvement in Food Production
- Plant Breeding
- Tissue Culture
- Single Cell Protein (SCP)
- Biofortification
- Animal Husbandry (Livestock)
- Animal Breeding
- Dairy Farming
- Poultry Farming
- Apiculture (Bee Farming)
- Pisciculture (Fish Farming)
- Sericulture
- Lac Culture
- Microbes in Human Welfare
- Microbes in Industrial Production
- Microbes in Sewage Treatment
- Microbes in Energy Generation
- Microbes as Biocontrol Agents
- Microbes as Biofertilizers
Biotechnology
- Biotechnology
- Process and Principles of Biotechnology
- Methodology for rDNA Technology
- Commercial Applications of Biotechnology
- Bioethics
- Effects of Biotechnology on the Environment
- Biopatent and Biopiracy
- Transgenic Plants
- Transgenic animals
- Effects of Biotechnology on Human Health
- Tools and techniques for gene cloning/ rDNA technology
Organisms and Populations
- Organisms and the Environment Around
- Habitat
- Niche
- Structure and function of an Ecosystem
- Adaptations and Its Types
- Population
- Population Interactions
- Organisms and Populations
Ecosystems and Energy Flow
- Ecosystem
- Structure and function of an Ecosystem
- Concept of Energy Flow in an Ecosystem
- Classification of Animal
- Trophic Level
- Food Chain
- Food Web
- Ecological Pyramids
- Nutrient Cycles
- Ecological Succession
- Ecosystem Services
- Productivity
- Decomposition
- Phosphorus Cycle
- Carbon Cycle
Biodiversity, Conservation and Environmental Issues
- Biodiversity
- Levels of Biodiversity
- Patterns of Biodiversity
- Biodiversity Current Scenario
- Loss of Biodiversity
- Conservation of Wildlife
- Biological Diversity Act, 2002
- Environmental Issues
- Air Pollution and Its Causes
- Noise Pollution
- Water Pollution and Its Causes
- Green House Effect
- Preventive Measures of Green House Effect
- Global Warming
- Preventive Measures of Global Warming
- Ozone Layer Depletion
- Deforestation and Its Causes
- Mission Harit Maharashtra
- Conservation of Biodiversity
Excretion and Osmoregulation
- Modes of Excretion: Ammonotelism, Ureotelism, and Uricotelism
- Human Excretory System
- Function of the Kidney - “Production of Urine”
- Regulation of Kidney Function
- Common Disorders of the Urinary System
Human Reproduction
- Introduction to Ecosystem
- Interactions in the Ecosystem
Introduction to Ecosystem:
The word “ecosystem” was coined in the 1930s when scientist Ray Claffam was asked to describe the relationship between physical and biological factors. His answer was “ecosystem,” and his colleague A.G. Tansley first used the term in 1935. It is also sometimes called a biotic community.
An ecosystem is a natural system formed by the interaction between living organisms (biotic factors) and non-living components (abiotic factors) of the environment. It represents a community of organisms and their physical surroundings, functioning as a single, self-sustaining unit.
Components of Ecosystem
Interactions in the Ecosystem:
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