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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 ...
The cyclic light-dependent reactions occur only when the sole photosystem being used is photosystem I. Photosystem I excites electrons which then cycle from the transport protein, ferredoxin (Fd), to the cytochrome complex, b 6 f, to another transport protein, plastocyanin (Pc), and back to photosystem I. A proton gradient is created across the ...
Photoheterotrophs generate ATP using light, in one of two ways: [6] [7] they use a bacteriochlorophyll-based reaction center, or they use a bacteriorhodopsin.The chlorophyll-based mechanism is similar to that used in photosynthesis, where light excites the molecules in a reaction center and causes a flow of electrons through an electron transport chain (ETS).
Dioptrics – Science of light and lenses; Diplomatics – Academic study of the protocols of documents – science of deciphering ancient writings and texts. [citation needed] Dosiology – study of dosage of drugs. [17] Dynamics – Study of forces and their effect on motion; Dysgenics – Decrease in genetic traits deemed desirable and study ...
Similar to light zonation, thermal stratification or thermal zonation is a way of grouping parts of the water body within an aquatic system based on the temperature of different lake layers. The less turbid the water, the more light is able to penetrate, and thus heat is conveyed deeper in the water. [17]
In biology and ecology, a resource is a substance or object in the environment required by an organism for normal growth, maintenance, and reproduction.Resources can be consumed by one organism and, as a result, become unavailable to another organism.
Ecosystem services, on the other hand, are generally "improvements in the condition or location of things of value". [45] These include things like the maintenance of hydrological cycles, cleaning air and water, the maintenance of oxygen in the atmosphere, crop pollination and even things like beauty, inspiration and opportunities for research ...
Terrestrial and aquatic phototrophs: plants grow on a fallen log floating in algae-rich water Phototrophs (from Ancient Greek φῶς , φωτός ( phôs, phōtós ) 'light' and τροφή ( trophḗ ) 'nourishment') are organisms that carry out photon capture to produce complex organic compounds (e.g. carbohydrates ) and acquire energy.