BIOLOGY

The notes related to biology

Neo- Darwinism or Modern Synthetic Theory of evolution: Introduction, Mutation, Genetic recombination, Natural selection, Genetic drift

Introduction: Darwin’s theory of origin of new species was supported by a number of scientists like Wallance, Haeckel, Weismann, Mendel etc. These supporters are known as the Neo-Darwinians, and the concept is called Neo-Darwinism. The modern synthetic theory explains the genetic basis of the adaptation of a population to new environmental conditions. It includes the […]

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Darwinism or theory of Natural Selection: Introduction, Facts, Objections

Introduction: Charles Robert Darwin (1809-1882), an English naturalist publishes his famous book “The Origin of Species by Natural Selection” in 1859. Darwin’s theory of natural selection is based on a mass of accurate observations and prolonged experimental led the whole scientific world to believe on the doctrine of evolution. Darwinism is based on several facts

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Lamarck, Evolution, and the Inheritance of Acquired Characters: Facts, Examples, Criticism

Theories of organic evolution: Organic evolution refers to the progression of life forms from simpler to more complex as a result of environmental changes and other factors. Evolution describes changes in the shape and behavior of organisms as they pass down through generations. It refers to the changes that occur within a population’s ancestry from

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Reproduction in organism: Importance, Types, Asexual reproduction, Sexual reproduction, Fertilization, Pollination

Introduction: Reproduction is an integral feature of all living beings by which a living being produces produce new individuals of the same species. This natural process is necessary for the survival and increase in the population of a species. If organisms do not reproduce, their population decreases and species will become extinct.  Importance: Types: There

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Evaporation of Water from the Leaf Surface

Transpiration- Types, Measurement, Mechanism, Factors, Significance, Advantages

Introduction: The process of the loss of water from the internal tissues of the living plants in the form of vapor the exposed parts of the plants is regarded as transpiration. Plant absorbs large amount of water from the soil through the root hair but only small amount is utilized in different metabolic activities. Types:

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Osmosis- Introduction, Types, Solution, Osmotic pressure, Factors, Significance

Introduction: Osmosis is biological process that refers to the movement of free water molecules from a region of high concentration to a region of low concentration across a partially-permeable membrane until they are evenly spread out. It may define as the diffusion of the solvent molecules into the solution through a semipermeable membrane. Types of

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