Zoology

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

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

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

What is Teratogenesis? Teratogenic Agents 1. Infectious agents 2. Physical agents 3. Chemical agents Chemical agents, including certain medications and substances, can have teratogenic effects on the developing fetus. These agents can disrupt normal development and contribute to the occurrence of birth defects. Here are some key points about different chemical agents and their teratogenic … Read more

What is Ageing? Different Types of Aging Aging is a complex process that can be categorized into different types based on various perspectives. Understanding these different types of aging can provide a comprehensive view of the aging process. Here are five common classifications: Overall, aging is a multifaceted process that encompasses various dimensions. By considering … Read more

What is Developmental Biology? Developmental biology is a scientific discipline that focuses on understanding how organisms grow, develop, and mature from a fertilized egg into a complex multicellular organism. It explores the processes, mechanisms, and patterns that shape the formation of tissues, organs, and the overall body plan throughout an organism’s life cycle. Developmental biologists … Read more

What is Developmental Biology? Developmental biology is a branch of biology that studies the processes and mechanisms by which multicellular organisms grow, develop, and reach their final form from a single fertilized egg or embryo. It examines how cells differentiate and specialize to form different tissues and organs, as well as how these structures are … Read more

Eggs are fascinating structures found in various organisms across the animal kingdom. They serve as the starting point for new life, harboring the potential for development and growth. However, not all eggs are created equal. Different species exhibit diverse types of eggs, varying in size, shape, and the presence of yolk. Moreover, eggs are surrounded … Read more

What is cleavage? Characteristics of cleavage Cleavage exhibits several distinct characteristics during the early stages of embryo development: Overall, cleavage is characterized by the rapid division of the fertilized egg, resulting in the generation of numerous blastomeres. These divisions lead to the formation of either a solid mass of cells (morula) or a hollow sphere … Read more

Special features of the gametes for fertilization Both gametes, the sperm and the egg, possess special features that enable successful fertilization. Egg: Sperm: In summary, the egg and the sperm possess specialized features that are essential for fertilization. The egg has protective coverings, recognition mechanisms, and cortical granules to prevent polyspermy and ensure compatibility with … Read more