Living organisms take energy in two major forms — autotrophic (photosynthetic) organisms take energy in the form of light, and heterotrophic org ...

The portion of the central nervous system that is located within the skull. It functions as a primary receiver, organizer, and distributor of info ...

The cell is a fundamental biological organizational unit from which almost of all known living beings are built. Cells are the smallest units of l ...

Denaturation is a process of changing the spatial structure of nucleic acids and proteins under the influence of high temperature, pressure, acids ...

Diffusion is movement of anything (atom, ions, molecules) through a thin semi-permeable membrane (cell membrane consists of a lipid bilayer) fro ...

DNA: The deoxyribonucleic acid is a very large, phosphorus- and nitrogen-containing molecule that serves as a carrier of genetic information. ...

The DNA molecule comprises of two polynucleotide chains. They are curved in the form of a double helix. Inside the spiral are nitrogen bases that ...

Enzyme, a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being alte ...

Enzymes are molecules that catalyze the biochemical processes in the cell. They are highly specific, powerful catalysts, each of which catalyzes a ...

An act of irritation or stimulation or of responding to a stimulus, the addition of energy, as the excitation of a molecule by absorption of photo ...

The breakdown of carbohydrates (glucose) into cells of microorganisms without the participation of oxygen is called fermentation.   ...

A forest ecosystem describes the community of plants, animals, microbes and all other organisms in interaction with the chemical and physical feat ...

Heredity is individuals’ characteristic to acquire the genetic information (nucleic acids) of their parents and to pass it on to their descendan ...

High molecular weight organic compounds made up of the binding of different units arranged in a certain way. The molecules that bind to each other ...

It is the condition of the vegetal, animal or human organism to resist a particular disease especially by preventing the development of a pathogen ...

It is the process by which phagocytes engulf and break down bacteria or particles.

Metabolism is the process involving a set of constructive (anabolism) or distructive (catabolism) chemical reactions that modifies a molecule into ...

Mitosis is a process of asexual reproduction of eukaryotic cells thanks to which from a single cell 2 genetically identical daughter cells are form ...

Phase in the cell cycle in which the nucleus divides and the DNA is divided. In the subsequent cell division, the genetic material of a cell is di ...

The nerve conducts nerve impulses in organism. It is a category of filamentous bands of  nervous tissues that connects parts of the nervous syste ...

Nucleic acids are macromolecules (consisting of chains of nucleotides) containing the biochemically codified genetic information of a living thing ...

Nucleic acids are macromolecules (consisting of chains of nucleotides) containing the biochemically codified genetic information of a living thing ...

Surgery in which tissue, parts of an organ or the whole organ is taken from one organism (donor) to be placed with a healing intent in another org ...

Pollination is the transfer (natural or artificial) of pollen of the stamen to the stigma of another plant to produce fecundation.   ...

Pollination is the transfer (natural or artificial) of pollen of the stamen to the stigma of another plant to produce fecundation.   ...

Pollination is the transfer (natural or artificial) of pollen of the stamen to the stigma of another plant to produce fecundation.   ...

The respiratory chain is the common path through which all the electrons originating from the most diverse nutrients in the cell are transferred t ...

Ribosomes are machines responsible for the translation of the genetic code of nucleic acids (messenger RNA) into the language of proteins. The rib ...

The solar system is consisting of the sun, the eight planets and their moons, comets, asteroids and meteorites.

Symbiosis is interaction between two different organisms living in close physical association, typically to the advantage of both. It is a mutuall ...

A synapse is a contact structure for transmitting a chemical or electrical signal from one nerve cell to another nerve cell (interneuronal synapse ...

A discharge of the air electricity of the clouds among themselves or against the earth, accompanied by lightning and thunder, usually accompanied ...

A tissue is an aggregate (set) of interdependent cells in an organism that have similar origin, shape, structure and function.   ...

A tissue is an aggregate (set) of interdependent cells in an organism that have similar origin, shape, structure and function. ...

Trophic chain is a series of organisms interrelated in their feeding habits in an ecosystem in which each species is the food of the next member o ...