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Agnatha – Characteristics, Classification, Morphology, Reproduction

Agnatha - Characteristics, Classification, Morphology, Reproduction

Agnatha are a primitive group of jawless fish that have existed for hundreds of millions of years. Creatures like lampreys and hagfish fall into this category. Unlike typical fish, they lack jaws, paired fins, and bony skeletons, relying on flexible cartilage for support. Lampreys often attach to other fish to feed on their bodily fluids, … Read more

Chondrichthyes – Characteristics, Classification & Examples

Chondrichthyes - Characteristics, Classification & Examples

Kingdom Animalia Phylum Chordata Subphylum Vertebrata Division Gnathostomata Superclass Pisces Class Chondrichthyes Characteristics of Chondrichthyes Chondrichthyes, also known as Sharks, Skates, and Rays, exhibit a range of fascinating characteristics. Here are some key features of these jawed fishes: These characteristics contribute to the unique adaptations and biological traits of Chondrichthyes, making them a diverse and … Read more

Osteichthyes – Characteristics, Classification and Examples

Osteichthyes - Characteristics, Classification and Examples

Kingdom Animalia Phylum Chordata Subphylum Vertebrata Division Gnathostomata Superclass Pisces Class Osteichthyes General Characteristics of Osteichthyes Osteichthyes, or bony fishes, exhibit a range of general characteristics that define this diverse class of vertebrates: These general characteristics contribute to the diversity and adaptability of bony fishes, allowing them to thrive in various aquatic habitats and play … Read more

Parental Care in Fishes – Different Methods with Examples

Parental Care in Fishes - Different Methods with Examples

Different Types Of Parental Care In Fishes Include 1. Deposition of Eggs Into Self-Made Nest Certain fish species exhibit the behavior of preparing nests to ensure the safe deposition and protection of their eggs, as well as the development of their young ones. The construction of these nests involves the participation of either males or … Read more

Regeneration – Definition, Types, Mechanism, Examples

Regeneration - Definition, Types, Mechanism

What is Regeneration? Definition of Regeneration Regeneration is the natural process by which organisms restore, repair, or replace lost or damaged body parts through the growth and differentiation of specialized cells, often known as stem cells. Types of Regeneration Regeneration, a pivotal biological process, can be classified into distinct types based on the underlying mechanisms … Read more

Metamorphosis – Definition, Types, Mechanism, Importance, Examples

Metamorphosis - Definition, Types, Mechanism, Importance, Examples

What is Metamorphosis? Metamorphosis is a biological process characterized by a profound transformation in the form, structure, or physiology of an organism as it progresses through distinct stages of its life cycle. It involves significant changes that are often irreversible and result in the emergence of a new developmental stage or life form. Stages of … Read more

Development Stages of frog – Pre-embryonic, embryonic and post-embryonic development

Stages in the development of frog - Pre-embryonic, Embryonic and Post-embryonic Development

The development of frogs follows a typical sequence of events observed in sexually reproducing organisms. It begins with the fertilization of an egg or zygote. The zygote then undergoes a series of divisions, dividing and re-dividing to form an embryo. The embryo is the earliest stage of development and remains within the egg or reproductive … Read more

Biogeny (Formation of Primitive Life)

Biogeny (Formation of Primitive Life)

What is Biogeny (Formation of Primitive Life)? 1. Formation of nucleic acids and nucleoproteins 2. Formation of Coacervates 3. Formation of Primary organism

Chemogeny or Chemical Evolution of Life

Chemogeny or Chemical Evolution of Life

What is Chemogeny? 1. Origin of Earth’s Primitive Atmosphere 2. Formation of Simple Inorganic Molecules (Water, Ammonia and Methane) The formation of simple inorganic molecules, such as water, ammonia, and methane, played a significant role in the chemical evolution of the primitive Earth. During the early stages, when the surface temperature of the Earth was less … Read more

Stem cell culture – Definition, Types, Application, Preparation

Stem cell culture - Definition, Types, Application, Preparation

What is Stem cell? Classification of Stem Cells Stem cells can be classified into different categories based on their origin, potency, and differentiation potential. Here are the main classifications of stem cells: It’s important to note that the classification of stem cells is not always rigid, as there can be overlap and ongoing research to … Read more

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