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 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
What is Artificial Selection? Artificial selection is a process by which humans are intentionally choosing certain organisms / traits for reproduction, it has been used for centuries actually even before the mechanism of genes was understood properly. In artificial selection, individuals that show desirable features (like color, yield, behavior etc.) are allowed to breed, while … Read more
Membranes are thin, flexible layers that act like barriers or filters, separating different spaces or substances while allowing certain things to pass through. Think of them as sheets or films—some natural, others human-made. In living things, cell membranes are crucial. They wrap around cells, controlling what enters or exits, like nutrients in and waste out. … Read more
A gland is a part of the body that makes and releases substances like hormones, enzymes, or fluids to help the body function. Think of it like a tiny factory—some glands send their products directly into the bloodstream to control things like growth, energy, or mood (these are called endocrine glands, like the thyroid or … Read more
A human cell is the basic unit that makes up your body, kind of like tiny rooms in a massive mansion working together to keep everything running. Picture it as a microscopic bubble with a flexible outer layer—the membrane—that decides what enters or exits. Inside, there’s a gooey mix called cytoplasm, packed with tiny machines … Read more
What is Peripheral Nervous System? The peripheral nervous system acts as a bridge between the brain, spinal cord, and the rest of the body. Think of it as a network of pathways that carry messages back and forth. While the brain and spinal cord form the central command center, the peripheral system handles communication with … Read more
What is Thyroid Gland? Definition of Thyroid Gland The thyroid gland is a butterfly-shaped endocrine organ located in the anterior neck that produces hormones such as thyroxine (T4), triiodothyronine (T3), and calcitonin, which regulate metabolism, growth, and calcium homeostasis. It plays a crucial role in maintaining the body’s metabolic rate and overall hormonal balance. Anatomical … Read more
What is Fish migration? Fish migration is the active, regular movement of fish populations from one place to another, often over long distances and various environments. This behavior is critical to the survival of fish and is a function of varied ecological, environmental, and biological factors. Fish migration is specific to different fish species, ranging … Read more
What is Evolution? Definition of Evolution Evolution is the process by which species change over time through the gradual accumulation of genetic variations, driven by mechanisms like natural selection, genetic drift, and mutation, leading to the development of new traits or species. Evolution Theory The theory of evolution explains how species change over time through … Read more
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