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Ornithology is a branch of zoology that concerns the study of birds. [1] Several aspects of ornithology differ from related disciplines, due partly to the high visibility and the aesthetic appeal of birds. [2]
Fitness is often defined as a propensity or probability, rather than the actual number of offspring. For example, according to Maynard Smith, "Fitness is a property, not of an individual, but of a class of individuals—for example homozygous for allele A at a particular locus.
Despite a different definition between mutualistic interactions and symbiosis, mutualistic and symbiosis have been largely used interchangeably in the past, and confusion on their use has persisted. [6] Mutualism plays a key part in ecology and evolution. For example, mutualistic interactions are vital for terrestrial ecosystem function as:
Sexual attraction is attraction on the basis of sexual desire or the quality of arousing such interest. [1] Sexual attractiveness or sex appeal is an individual's ability to attract other people sexually, and is a factor in sexual selection or mate choice .
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.
The word mosquito (formed by mosca and diminutive-ito) [2] is Spanish and Portuguese for little fly. [3] Mosquitoes have a slender segmented body , one pair of wings, three pairs of long hair-like legs, and specialized, highly elongated, piercing-sucking mouthparts .
Carl Linnaeus made the classification "domain" popular in the famous taxonomy system he created in the middle of the eighteenth century. This system was further improved by the studies of Charles Darwin later on but could not classify bacteria easily, as they have very few observable features to compare to the other domains.
The last word was the only variant of "evolved" in the first five editions of the book. "Evolutionism" at that time was associated with other concepts, most commonly with embryological development. Darwin first used the word evolution in The Descent of Man in 1871, before adding it in 1872 to the 6th edition of The Origin of Species. [148]