The sides of its head and chin are a dark shade of blue.
History of evolutionary thought Adaptation is an observable fact of life accepted by philosophers and natural historians from ancient times, independently of their views on evolutionbut their explanations differed. In natural theologyadaptation was interpreted as the work of a deity and as evidence for the existence of God.
Pangloss  is a parody of this optimistic idea, and David Hume also argued against design. The series was lampooned by Robert Knoxwho held quasi-evolutionary views, as the Bilgewater Treatises.
Charles Darwin broke with the tradition by emphasising the flaws and limitations which occurred in the animal and plant worlds. This illustrates the real merit of Darwin and Alfred Russel Wallaceand secondary figures such as Henry Walter Batesfor putting forward a mechanism whose significance had only been glimpsed previously.
A century later, experimental field studies and breeding experiments by people such as E. Ford and Theodosius The adaptations and lifestyle of the produced evidence that natural selection was not only the 'engine' behind adaptation, but was a much stronger force than had previously been thought.
The Modern Synthesis  What adaptation is[ edit ] Adaptation is primarily a process rather than a physical form or part of a body.
From this we see that adaptation is not just a matter of visible traits: Many aspects of an animal or plant can be correctly called adaptations, though there are always some features whose function remains in doubt.
By using the term adaptation for the evolutionary process, and adaptive trait for the bodily part or function the productone may distinguish the two different senses of the word. The other process is speciationin which new species arise, typically through reproductive isolation.
An organism must be viable at all stages of its development and at all stages of its evolution. This places constraints on the evolution of development, behaviour, and structure of organisms.
The main constraint, over which there has been much debate, is the requirement that each genetic and phenotypic change during evolution should be relatively small, because developmental systems are so complex and interlinked.
However, it is not clear what "relatively small" should mean, for example polyploidy in plants is a reasonably common large genetic change. Structural adaptations are physical features of an organism, such as shape, body covering, armament, and internal organization.
Behavioural adaptations are inherited systems of behaviour, whether inherited in detail as instinctsor as a neuropsychological capacity for learning.
Examples include searching for foodmatingand vocalizations. Physiological adaptations permit the organism to perform special functions such as making venomsecreting slimeand phototropismbut also involve more general functions such as growth and developmenttemperature regulationionic balance and other aspects of homeostasis.
Adaptation affects all aspects of the life of an organism. The following definitions are given by the evolutionary biologist Theodosius Dobzhansky: Adaptation is the evolutionary process whereby an organism becomes better able to live in its habitat or habitats. Adaptedness is the state of being adapted: An adaptive trait is an aspect of the developmental pattern of the organism which enables or enhances the probability of that organism surviving and reproducing.
Adaptation differs from flexibility, acclimatizationand learning. Flexibility deals with the relative capacity of an organism to maintain itself in different habitats: Acclimatization describes automatic physiological adjustments during life;  learning means improvement in behavioral performance during life.
Flexibility stems from phenotypic plasticitythe ability of an organism with a given genotype to change its phenotype in response to changes in its habitator to move to a different habitat.
A highly specialized animal or plant lives only in a well-defined habitat, eats a specific type of food, and cannot survive if its needs are not met. Many herbivores are like this; extreme examples are koalas which depend on Eucalyptusand giant pandas which require bamboo.
A generalist, on the other hand, eats a range of food, and can survive in many different conditions.driving Driving. Driving adaptations help with speed control, steering and signalling, and they vary from simple attachments to replacing all existing controls with a system individually designed for you.
The bluegill (Lepomis macrochirus) is a species of freshwater fish sometimes referred to as bream, brim, or copper nose. It is a member of the sunfish family Centrarchidae of the order benjaminpohle.com is native to North America and lives in streams, rivers, lakes, and ponds. It is commonly found east of the Rockies.
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The first three adaptations are "Empress," "Huck," and "Sharkey the Bounty Hunter.". Home Animals of the World Animal Photos The Animal Kingdom Animal Activities About Us Shop Contact Us: GiraffeGiraffa camelopardalis: Location, Habitat and Diet. Giraffes live in small groups in parts of Africa where food is adequate, south of the Saharan Desert.
The habitat of giraffes is the open plains of the African savanna where trees .