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Environment in Biological Definition

Biology

... they have with each other and with their environment . Biology encompasses a broad spectrum of ... of an open system to regulate its internal environment so as to maintain a stable condition, by means of ... thing interacts with other organisms and its environment . One of the reasons that biological systems can ...

Biodiversity

... that live in communities. Depending on their environment , organisms do not invariably use the same ... applies to species, but also to their immediate environment ( biotope ) and the ecoregions the organisms ... Resources for Food and Agriculture List of environment topics External links ActionBioscience ...

Homeostasis

... living organisms, to regulate its internal environment so as to maintain a stable condition, by means of ... organisms require a homeostatic internal environment , in order to live ; many environmentalists ... that actively modifies its planet to produce the environment that suits its needs. In this view, the entire ...

Origin of life

... self-replicating life forms; however, in an environment with no pre-existing life these molecules may have accumulated and provided a rich environment for chemical evolution ("soup theory"). On the ... of a primitive metabolism which could provide an environment for the later emergence of RNA replication. One ...

Polymerase chain reaction

... the enzyme was used in vitro (in a controlled environment outside an organism). The double-stranded DNA was ... Buffer, which provides a suitable chemical environment for the DNA-Polymerase The PCR reaction is ... avoid contamination from other DNA present in lab environment (bacteria, viruses, own DNA etc.) should be ....

Phenotype

... a simple equation: Phenotype = Genotype + environment A phenotype is any detectable characteristic ... by an interaction between its genotype and environment (see genotype-phenotype distinction and ... to include effects on other organisms or the environment in The Extended Phenotype . See also ...

Thermoregulation

... state of stability between an animal's internal environment and its external environment (the study of such processes in zoology has been ... regulation. Some animals living in cold environment maintain their body temperature, preventing heat ...

Adaptive radiation

... is introduced to a new ecosystem , or when a species can survive in an environment that was unreachable before. For example, the Darwin's finches on the ... species in the ecosystem, successfully survive in a radically changed environment will probably branch into new species that cover the new ecological niches ...

Artificial life

... proceeded logically from step to step by combining information from the environment and its own programming, and said that natural organisms would in the end ... They wrote a script describing the behavior of termites, then modified the environment and watched the way that the simulated, script-driven insects reacted. ...

Cancer

... 5.1 Molecular biology 5.2 Morphology 5.3 Heredity 5.4 environment and diet 6 Prevention 7 Coping with cancer 8 Social ... of the APC gene that leads to early onset of colon carcinoma . environment and diet The most consistent finding, over decades of research, is the ...

Endosymbiont

... it eats. The benefit for the bacteria is that it is protected from the environment outside the insect cell, and presumably receives nutrients from the ... found in other bacteria. Presumably these genes are not needed in the environment of the host insect cell. (A complementary theory as to why the bacteria ...

Endosymbiont

... it eats. The benefit for the bacteria is that it is protected from the environment outside the insect cell, and presumably receives nutrients from the ... found in other bacteria. Presumably these genes are not needed in the environment of the host insect cell. (A complementary theory as to why the bacteria ...

Evolution

... mutations do not affect the organism's chances of survival in its natural environment and can accumulate over time, which might result in what is known as ... of symbolic (extrasomatic) learning, can change their environment, or the environment of any species, in such a way as to result in new selective forces. ...

Extinction

... survive or reproduce in its environment, and unable to move to a new environment where it can do so, dies out and becomes extinct. Extinction of a species ... and becomes extinct. This may occur by direct effects, such as the environment becoming toxic , or indirectly, by limiting a species' ability to compete ...

Leaf

... action for water distribution. In order to adapt to their different environment (such as sun or shade), plants had to adapt this structure to obtain ... sticky secretions. Adaptations In order to survive in a harsh environment , leaves can adapt in the following ways: Hairy leaf surface to ...

Marine biology

... only (or mainly) in the water, thus its classification is based on the environment rather than on taxonomy . Contents ... (by volume) biome on planet earth and since they exist in a watery environment it means that very different biological functions have evolved . Fish ...

Osmoregulation

... and osmoregulators. Osmoconformers match their body osmolarity to their environment . It can either be active or passive. An example are marine fish. By ... diffusion and active transport. As osmotic action pushes water from the environment into the cytoplasm, the vacuole moves to the surface and disposes the ...

Prokaryote

... . Contents showTocToggle("show","hide") 1 Structure 2 environment 3 Evolution of prokaryotes 4 See also Structure The ... division , sometimes through the help of a secreted slime layer . environment Prokaryotes are found in nearly all environments on earth. Archaea in ...

Species

... the environment: different environments favor different traits. Since the environment effectively selects which organisms live to reproduce, it is the environment (the "fight for existence") that selects the traits to be passed on. This ...

Antigen

... that causes an allergic reaction . It can be eaten, inhaled, injected or comes into contact with skin. Antigens are presented by a cell to its environment via a histocompatibility molecule . Depending on the antigen presented and the histocompatibility molecule used, several types of immune cells can ...

Bacterium

... include the mycoplasmas (Mollicutes) and certain Gram-negative bacteria. Benefits and dangers Bacteria are both harmful and useful to the environment , and animals , including humans . The role of bacteria in disease and infection is important. Some bacteria act as pathogens and cause tetanus ...

Biological membrane

... as channels . Such membranes typically define enclosed spaces or compartments in which cells may maintain a chemical or biochemical environment that differs from the outside. For example, the membrane around peroxisomes shields the rest of the cell from peroxides , and the plasma ...

Botany

... provides humanity with important medicine and materials. Understand environmental changes Plants can also help us understand changes in on our environment in many ways. Understanding habitat destruction and species extinction is dependent on an accurate and complete catalogue of plants provided ...

Cell biology

... or cytology ) is an academic discipline which studies the physiological properties of cells , as well as their behaviours , interactions, and environment ; this is done both on a microscopic and molecular level. Cell biology researches both single-celled organisms like bacteria and specialized ...

Ion gradient

... NADPH synthesis and ATP synthesis/hydrolysis. Some archaea , most notably halobacteria , make proton gradients by pumping in protons from the environment with the help of the solar driven enzyme bacteriorhodopsin , here it is used for driving the molecular motor enzyme ATP synthase to make the ...

Cryptozoology

... proven to have a real basis in biological fact. Cryptozoologists often point out that natives often know a great deal more about their immediate environment (and the animals that inhabit it) than western investigators, and therefore suggest that, even today, thus far unproven tales and traditions ...

Down syndrome

... behind. If there are no siblings willing or able to take the disabled person in, some institution will have to provide an apt and comfortable environment for the person with Down syndrome, as they are usually unable to run their own household, apply for a regular job, get a driver's licence and take ...

Ebola

... Books Doubleday, 1994 . Russell, Brett. What are the Chances? Ebola FAQ. 3 September 2003 . TED Case Study: Ebola and Trade . Trade and environment Databases. May 1997 . 7 November 2003 . ...

Endomembrane system

... The following organelles are part of the endomembrane system: The plasma membrane is a lipid bilayer membrane that separates the cell from its environment and regulates the transport of molecules and signals into and out of the cell. The nuclear envelope is the membrane around the nucleus of the ...

Warm-blooded

... homeothermic ) animal is one that can keep its core body temperature at a nearly constant level regardless of the temperature of the surrounding environment (that is, to maintain thermal homeostasis ). This can involve not only the ability to generate heat , but also the ability to cool down if ...

Bacterium

... include the mycoplasmas (Mollicutes) and certain Gram-negative bacteria. Benefits and dangers Bacteria are both harmful and useful to the environment , and animals , including humans . The role of bacteria in disease and infection is important. Some bacteria act as pathogens and cause tetanus ...

Gene regulatory network

... The following example illustrates how a Boolean network can model a GRN together with its gene products (the outputs) and the substances from the environment that affect it (the inputs). Stuart Kauffman was amongst the first biologists to use the metaphor of Boolean networks to model genetic regulatory ...

Glycolipid

... . The carbohydrates are found on the outer surface of all eukaryotic cell membranes. They extend from the phospholipid bilayer into the aqueous environment outside the cell where it acts as a recognition site for specific chemicals as well as helping to maintain the stability of the membrane and ...

Gregor Mendel

... of the traits passed on to the next generation. This experiment was "designed to support or to illustrate Lamarck's views concerning the influence of environment upon plants." He found that the plants' respective offspring retained the essential traits of the parents, and therefore were not influenced by the ...

Habitat

... The term habitat has a number of unrelated meanings: A concept in Ecology: see habitat . A space habitat is a self-contained environment supporting some number of people in the vacuum of space in a permanent way. See space colonization . Habitat is the name of a chain of ...

Human

... view of human evolution states that humans evolved in inland savanna environments in Africa. (See Human evolution , Vagina gentium , environment of Evolutionary Adaptedness .) Technology has allowed humans to colonize all of the continents and adapt to all climates. Within the last few ...

Immunology

... to the development of rapid techniques for the diagnosis of disease, microbes and even illegal drugs in vivo (of course tests conducted in closed environment have a higher degree of accuracy). Such testing is also used to distinguish compatible blood types . Evolutionary immunology Study of the ...

Jean-Baptiste Lamarck

... functional capacity, until it finally disappears. All the acquisitions or losses wrought by nature on individuals, through the influence of the environment in which their race has long been placed, and hence through the influence of the predominant use or permanent disuse of any organ; all these are ...

Lac repressor

... the appropriate recipes for the current ambient conditions. For this humans need regulator molecules that act like factory foremen. They monitor the environment and use the information to signal to the cell. An enhancer tells the cell to crank up production of a particular substance. A repressor tells the ...

Lichen

... the fact that the components belong to separate lineages. The algal cells contain chlorophyll , permitting them to live in a purely mineral environment by producing their own organic compounds (see photosynthesis ). The fungus protects the alga against drying out and provides it with minerals ...
Other Contents
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