- General features
- Natural history
- Reproduction
- Form and function
- Classification
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Perisian ini banyak digunakan oleh jurugambar digital dan perusahaan iklan sehingga dianggap sebagai pasaran utama untuk perisian gambar. Photoshop boleh digunakan pada Microsoft Windows, Mac OS X, dan Mac OS dan boleh juga digunakan oleh sistem operasi lain seperti Linux dengan bantuan perisian tertentu seperti CrossOver. Mac OS X - Either copy the Anura font file (s) to /Library/Fonts (for all users), or to /Users/Yourusername/Library/Fonts (for you only). Mac OS 9 or earlier - You have to convert the Anura font file (s) you have downloaded. Anura Reporting API - Script Endpoints - Operating Systems. The Script operating systems endpoint will allow you to retrieve a table of operating system specific data applicable to.
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Join Britannica's Publishing Partner Program and our community of experts to gain a global audience for your work! William E. DuellmanSee All ContributorsFrog and toad, (order Anura), either also called anuran or salientian, amphibians belonging to the order Anura, which, because of their wide distribution, are known by most people around the world. The name frog is commonly applied to those forms with long legs and smooth mucus-covered skins, while toad is used for a variety of robust short-legged forms, especially those with rough skins. The name toad is applied so unevenly that one member of a family may be called a toad and a closely related member a frog. The familiar members of the family Bufonidae may be distinguished as “true toads.” In this article, frog is applied generally to all members of order Anura and toad to those for which it has traditionally been used. There are roughly 7,300 species of living frogs and toads.
Frogs are used as teaching tools from grade school through college. One of the first biology lessons many children receive is through the rearing of the larvae, known as tadpoles or pollywogs, in science classes. Students become familiar with frog anatomy and embryology in biology courses.
People in various parts of the world eat frog legs, and some kinds of toads are used in insect control. Certain South American Indians use the poisonous secretions of some kinds of frogs for poison arrows and darts (seepoison frog), and now biochemists are studying the possible medical uses of the constituents of the poison. The biologist interested in evolution finds a vast array of interesting and often perplexing problems in the study of frogs, such as the relatively sudden decline of many frog species since the late 20th century.
General features
Size range and diversity of structure
Although all frogs are readily recognizable, there are great varieties of sizes and of structural modifications. Many frogs are tiny animals; perhaps the smallest is the Brazilian Psyllophryne didactyla, adults of which measure 9.8 mm (0.4 inch) or less in body length (with legs drawn in). However, the West African goliath frog, Conraua goliath, has a body length of nearly 300 mm (12 inches). Many frogs and toads have smooth moist skins. Toads of the genus Bufo are familiar as “warty” amphibians, the skin being highly glandular and covered with tubercles (small, round nodules). Frogs of many other families have rough tubercular skins, usually an adaptation for life in the less humid environments. The opposite extreme is found in the small arboreal (tree-dwelling) frogs of the tropical American family Centrolenidae, in which the skin on the underside is so thin and transparent that the heart and viscera can be seen through the skin. In most species, cutaneous gas exchange (that is, breathing through the skin) supplements the oxygen taken in by the lungs; however, the lungless Barbourula kalimantanensis of Borneo obtains all its oxygen through its skin.
Most frogs move by leaping. The long and powerful hind limbs are straightened rapidly from the crouching position, propelling the frog through the air. Many arboreal frogs—especially members of the families Hylidae, Rhacophoridae, Centrolenidae, and others—have adhesive disks on the ends of the fingers and toes and leap from branch to branch or from leaf to leaf (seetree frog). The families Bufonidae, Rhinophrynidae, and Microhylidae and certain burrowing species in other families have relatively short hind limbs and move forward by series of short hops. Some bufonids actually walk instead of hop. Highly modified members of the hylid subfamily Phyllomedusinae have opposable digits on the hands and feet and walk slowly along branches, deliberately grasping the branch in the manner of tiny lemurs. Many kinds of frogs have membranous webbing between the fingers and toes; in the aquatic species, the webbing on the feet aids in swimming. The extreme in this specialization is seen in the aquatic family Pipidae. Members of that family normally never leave the water. In regions of the Earth subjected to long dry periods, frogs must seek cover to avoid desiccation; they have behavioral and structural adaptations to conserve water.
Although many frogs are unimpressively coloured, some species are brilliantly marked. The most common colours are brown, gray, green, and yellow. Uniformly coloured frogs are the exception rather than the rule. The markings of a frog may seem bold when observed out of the natural habitat, but they usually are concealing or visually disruptive when the frog is in its environment (see belowcoloration).
Distribution and abundance
Because of their morphological and physiological adaptations, frogs are able to inhabit most regions of the world except the extremely cold landmasses at high latitudes and some oceanic islands that they have been unable to colonize because of the barriers provided by salt water. Frogs live in desert regions below sea level and in montane areas up to elevations above 4,560 metres (15,000 feet). Some members of the genus Rana live north of the Arctic Circle. Although widely distributed on Earth, frogs are most diverse and abundant in the tropics, and five or six of the 28 families are restricted to the tropics. In most temperate areas of the world, the number of species of frogs at any one locality is usually fewer than 10, but in the tropics, especially in rainforests, the number of species is much greater. At one locality in the upper Amazon basin in eastern Ecuador, 83 species are known to occur, about the same number as is known for all of the United States.
In a complex environment such as a tropical rainforest, the large number of species of frogs partition the environmental resources in a variety of ways. In the humid tropics, frogs can be active throughout the year, but many species are seasonal in their breeding activity. Various kinds of sites and different seasons are used for calling and egg laying; such temporal and spatial separation avoids interspecific competition. Frogs feed mostly on insects and other invertebrates, and the abundance of food in tropical rainforests probably places no competitive restrictions on this aspect of environmental resources. Some large species eat vertebrates, including small rodents and other frogs.
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People say life is more fun when you play games, but I say life is more fun and thrilling when you develop games. So, folks are you ready to add some thrill in your life by developing games!
Before introducing you to the list of game engines, written in either C or C++ programming language, a game engine is a dedicated software or an architecture, or program that developers use for creating games. It provides developers with a way of adding physics, rendering, AI and other components, libraries and tools without programming them. They do require advanced programming experience and at the same time highly customizable. Game engines also provide limitless possibilities to develop the game.
Let me introduce you to some of the best gaming engines available out there. In order to produce best you need to choose the best. A suitable game engine leads your way to the success. So, before developing any game selection of gaming engine is the most crucial steps.
I have put my efforts for you to hunt the internet and to compile the comprehensive list of best game engines available out there.
Please note that I tried to include only game engines written in C or C++ programming language only.
The list is big so I am listing the names here with link to details page. The details page shows the description of the game engine along with few games developed using the engine and reference websites.
So, here you go….!