What Is Trochophore Larva? Trochophore larva refers as an early free-swimming stage found by many marine invertebrates like annelids, mollusks, etc. It can define as – a small, spherical or pear-shape larva having a ring of cilia (called prototroch) around its middle part. This larva usually formed after fertilization → from the zygote → and … Read more
Pureline selection is a method used in plant breeding where plants are chosen from a single self-pollinated variety to create a population that is genetically uniform. It was first introduced by Johannsen (1903) while working with beans (Phaseolus vulgaris). The method based on assumption that variation seen in self-pollinated crops is mostly due to environment … Read more
What is Lane-Eynon Method? Principle of Lane-Eynon Method The method based on reduction of cupric ions (Cu²⁺) to cuprous oxide (Cu₂O) by the reducing sugars in alkaline condition. In the reaction, CuSO₄ from Fehling A and alkaline tartrate from Fehling B react to form a deep blue cupric–tartrate complex, which remain stable in hot solution … Read more
Post-transcriptional modification is a set of biological processes common to most eukaryotic cells by which an primary RNA transcript is chemically altered following transcription from a gene to produce a mature, functional RNA molecule that can then leave the nucleus and perform any of a variety of different functions in the cell.
What is Analytical balance? What is Triple beam balance? Difference Between Analytical Balance Vs Triple Beam Balance 1. Precision – Analytical balance gives very high precision (up to 0.0001 g) while triple beam balance only measure till 0.01 g, so less sensitive comparatively. 2. Power Source – Analytical balance mostly works on electric / electronic … Read more
What is Budding? Definition of Budding Budding is a form of asexual reproduction in which a new organism develops from an outgrowth or “bud” on the parent organism, eventually detaching to live independently. Types of Budding I. Types of Biological Budding (Asexual Reproduction) II. Types of Horticultural Budding (Plant Grafting Techniques) 1. Budding in Plants … Read more
What is Biogeny (Formation of Primitive Life)? 1. Formation of nucleic acids and nucleoproteins The formation of nucleic acids and nucleoproteins considered as one of the key transition in Biogeny where information molecules begin to store and transmit life instructions. It started after Chemogeny produced small organic monomers like nucleobases, sugars, phosphates, etc. Prebiotic synthesis … Read more
What is Polarizing Microscope? Principles of Polarized Light Microscopes The Light Path and Image Formation of Polarized Light Microscopes Parts of a Polarized Light Microscope 1. Light Source – usually a halogen bulb that gives bright white light; it must be stable so the color don’t change by heating or voltage drift. 2. Condenser – … Read more
What is Nondisjunction? Types of Nondisjunction Causes of Nondisjunction Molecular Biology of Nondisjunction Consequences of Nondisjunction The nondisjunction is the failure when chromosomes don’t separate properly during cell division (like meiosis/mitosis), causing abnormal number of chromosomes in daughter cells. Such imbalance is termed as aneuploidy, sometimes loss of one (monosomy 2n–1) or gain of one … Read more
What is cleavage? Characteristics of cleavage Step by step process of Cleavage Types of cleavages The cleavage pattern in embryos mainly determined by yolk quantity and how that yolk is distributed by the cytoplasm.Also, timing and direction of mitotic spindle (inside egg) play important role. Yolk usually slow / restrict the process of complete division. … Read more
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