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A gene is a unit of heredity that corresponds to a region of deoxyribonucleic acid (DNA) that carries genetic information that controls form or function of an organism. DNA is composed of two polynucleotide chains that coil around each other to form a double helix . [ 72 ]
Keto-enol tautomerism#DNA, the final key insight, from a Pauling collaborator, that the textbooks of the time were wrong, that led to the solved structure; Avery-MacLeod-McCarty experiment, the first demonstration that DNA was likely to be the genetic material; Chargaff's rules, which showed that A:T and G:C occurred in equal amounts
He coined the term cell (from Latin cellula, meaning "small room" [41]) in his book Micrographia (1665). [42] [40] 1839: Theodor Schwann [43] and Matthias Jakob Schleiden elucidated the principle that plants and animals are made of cells, concluding that cells are a common unit of structure and development, and thus founding the cell theory.
Biology: The Unity and Diversity of Life is an introductory textbook of biology, for students. [ further explanation needed ] The fifteenth edition was published in 2019, by Cengage Learning . It was compiled by Cecie Starr and Ralph Taggart with pictures and illustrations by Lisa Starr.
Cell biology (also cellular biology or cytology) is a branch of biology that studies the structure, function, and behavior of cells. [1] [2] All living organisms are made of cells. A cell is the basic unit of life that is responsible for the living and functioning of organisms. [3] Cell biology is the study of the structural and functional ...
The central nervous system (CNS) is the part of the nervous system consisting primarily of the brain, spinal cord and retina.The CNS is so named because the brain integrates the received information and coordinates and influences the activity of all parts of the bodies of bilaterally symmetric and triploblastic animals—that is, all multicellular animals except sponges and diploblasts.
In evolutionary biology, function is the reason some object or process occurred in a system that evolved through natural selection.That reason is typically that it achieves some result, such as that chlorophyll helps to capture the energy of sunlight in photosynthesis.
This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...