evolution

(redirected from evalution)
Also found in: Dictionary.

evolution

 [ev″o-lu´shun]
the process of development in which an organ or organism becomes more and more complex by the differentiation of its parts; a continuous and progressive change according to certain laws and by means of resident forces.
convergent evolution the development, in animals that are only distantly related, of similar structures or functions in adaptation to similar environments.

ev·o·lu·tion

(ev'ō-lū'shŭn),
1. A continuing process of change from one state, condition, or form to another.
2. A progressive distancing between the genotype and the phenotype in a line of descent.
3. The liberation of a gas or heat in the course of a chemical or enzymatic reaction.
[L. e-volvo, pp. -volutus, to roll out]

evolution

(ĕv′ə-lo͞o′shən, ē′və-)
n.
1. A continuing process of change from one state, condition, or form to another.
2. Change in the genetic composition of a population during successive generations, often resulting in the development of new species. The mechanisms of evolution include natural selection acting on the genetic variation among individuals, mutation, migration, and genetic drift.

ev·o·lu·tion

(ev'ŏ-lū'shŭn)
1. A continuing process of change from one state, condition, or form to another.
2. A progressive distancing between the genotype and the phenotype in a line of descent.
[L. e-volvo, pp. -volutus, to roll out]

evolution

The theory that all living organisms have developed in complexity, from a simple life form. Evolution occurs by the natural selection of those who, by the fortune of spontaneous random changes (mutations), happen to be best suited to their contemporary environment, to survive and reproduce. It does not occur by the passing on to offspring of characteristics acquired during the lifetime of an individual. Characteristics are passed on by the transmission of DNA from parents to offspring and, unless mutation has occurred, this DNA is an identical copy of the DNA of preceding generations.

evolution

an explanation of the way in which present-day organisms have been produced, involving changes taking place in the genetic make-up of populations that have been passed on to successive generations. According to DARWINISM, evolutionary MUTATIONS have given rise to changes that have, through NATURAL SELECTION, either survived in better adapted organisms (see ADAPTATION, GENETIC), or died out. Evolution is now generally accepted as the means which gives rise to new species (as opposed to SPECIAL CREATION) but there is still debate about exactly how it has taken place and how rapidly changes can take place. See LAMARCKISM.

Patient discussion about evolution

Q. How the bacterias are produced?

A. The Bacteria are a large group of unicellular microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals. (The name comes from the Greek bakterion, meaning small staff.) Bacteria are ubiquitous in every habitat on Earth, growing in soil, acidic hot springs, radioactive waste,[2] water, and deep in the Earth's crust, as well as in organic matter and the live bodies of plants and animals. There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a millilitre of fresh water; in all, there are approximately five nonillion (5×1030) bacteria on Earth,[3] forming much of the world's biomass.[4] Bacteria are vital in recycling nutrients, with many important steps in nutrient cycles depending on these organisms, such as the fixation of nitrogen from the atmosphere and putrefaction. http://en.wikipedia.org/wiki/Bacteria Hope this helps.

More discussions about evolution
References in periodicals archive ?
Evalution of tolerance of Psidium species to the Meloidogyne mayaguensis nematode.
The evalution of foot morphology in children between 6 and 17 years of age: A cross-sectional study based on footprints in a Mediterranean population.
This research analysis is both a critical appraisal and evalution of the last twelve years of constant and permanent publication of the Revista de Stiinte Politice.
Braga, "A simplified technique of lightening perfomance evalution applied to LED-based Modern liuminares", in 2009 IEEE Conf., pp.
Assessment of tolerant sunfish populations (Lepomis sp.) inhabiting selenium-laden coal ash effluents.2.Tissue biochemistry evalution. Ecotoxicol.
KDIGO clinical practice guideline for the diagnosis, evalution, prevention, and treatment of chronic kidney disease-mineral and bone disorder (CKD-MBD)", Kidney Int., Vol.76 (Suppl.113), pp.1-130
Abdul-Riadda Bahmin, has indicated the delegation evalution 10 days visit for the water harvesting project in the sudan rural areas, appreciationg the effforts of the Ministry of Electricity and Dams on the information garthering process which has resulted in the signing of the agreement, noting that the project will not the last of its kind, pointing that the loan repayment period is 20 years in the form of premium charges with the interest of 1.5%, indicating that the fund covers 60% of the total cost of 170 million dollar, of which 68 million dollar for the project first phase and 34 for the second one.
At the AACC meeting in Chicago last summer, we showcased the "Evalution," a rapid and multiplexed analysis platform that supports a broad range of biological assays.
In section 2.1 we dicussed about usability evalution methods cognitive walkthrough (CW) is a usability evaluation method that investigates the effect of interface design decisions on the user's problem solving processes and the user's ability to learn to use a system through exploration (Huart Kolski and Sagar 2004).
The recommendations provide guidelines on the evalution of existing lifting appliances as well as the design and qualification of new lifting systems for subsea operations.
M2 PHARMA-October 8, 2014-MyCartis introduces multiplex biomarker analysis platform Evalution