A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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The discussion of the anatomy and evolution of eyes. Consider using the "vision" tag for questions regarding how the brain interprets information from the eyes.
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The study of the physiology of the nervous system, with emphasis on transcellular communication, and cellular and molecular processes involved in neural communication.
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Any substance consumed to provide nutritional support for the body.
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The study of blood, the blood-forming organs, along with blood diseases and their treatment.
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The area of physiology dealing with the production and effects of hormones.
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used or the meaning of words as used in scientific literature. Questions should ideally include a link or quote as context for where the term was encountered.
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A mechanism of evolution that leads to non-random spread of genes due to the effect that genes have on reproductive success.
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The study of genomes, the entire set of genes in an organism.
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The use of methods from the physical sciences to aid in the study of biological systems.
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Questions relating to biological theory or theoretical developments that deals with biological processes.
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a method of replicating DNA exponentially from even a single molecule.
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globular proteins that catalyse a biochemical reaction, increasing the overall rate by reducing activation energy. Most chemical reactions in a cell need enzymes in order to occur at rates…
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A change in an organism's genomic sequence.
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harnessed to assemble organic compounds (esp. glucose) from inorganic carbon dioxide.
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Questions related to the study of the distributions and changes of allele frequency in a population.
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a small infectious agent that can replicate only inside the living cells of an organism. Virology is the study of viruses.
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The process through which a biological organism grows to maturity. In certain contexts it can mean the changes the organism goes through over its entire lifetime.
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The contractile tissue of animals derived from the mesodermal layer of embryonic germ cells.
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Questions on the classification of biological organisms, and the methods used for classifying them.
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The study of the appropriate provisions required to sustain life in an organism or the provisions themselves.
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A single piece of DNA coiled and organized along with RNA and proteins found in the cell.
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Questions relating to the study of birds.
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Virology deals with the study of viruses, infectious entities that require the machinery of a host cell to replicate.
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Models that analyse biological systems or processes using the tools of applied mathematics.
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The study of the internal structure of organisms.
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The study of animal behaviour.
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Questions related to mammals.
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The scientific study of short- and long-term changes in the size and age composition of populations and the processes driving these changes.
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The biological process characterized by reversible unconsciousness, unresponsiveness to external stimuli and motor passivity.
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the process of growing and maintaining living cells in vitro.
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The process that produces a complementary strand of RNA from a section of DNA or (rarely) other RNA.
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Organs playing some role in digestion: the breaking down of food into smaller components that can be up-taken and used as source of energy or stucture.
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A sub-discipline of evolutionary biology which involves the study of evolutionary relatedness between different organisms based on their molecular and morphological features.
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The set of actions performed by an organism within a given environment
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Questions pertaining to populations of organisms.
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A selectively-permeable biological membrane that separates the interior of all cells from the outside environment.