Title: Yoshizawa–Randlett system
Content:  It is sometimes called the Square Base ; The bird base, or crane base, consists of a preliminary fold with both the front and the back sides petal folded upward. ; The frog base starts with a waterbomb base or preliminary fold. All four flaps are squash-folded (the result is the same in either case), and then the corners are petal folded upward. In origami, there is a series of several bases that many models are created with. In general, "base" refers to any folded paper that immediately precedes final folding and shaping of the model-to-be. The ones listed below are generally accepted as the traditional origami bases.
Title: Origami
Content:   Many origami books begin with a description of basic origami techniques which are used to construct the models. This includes simple diagrams of basic folds like valley and mountain folds, pleats, reverse folds, squash folds, and sinks. There are also standard named bases which are used in a wide variety of models, for instance the bird base is an intermediate stage in the construction of the flapping bird. Additional bases are the preliminary base (square base), fish base, waterbomb base, and the frog base.
Title: List of rock types
Content:  The following is a list of rock types recognized by geologists. There is no agreed number of specific types of rocks. Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe a rock type. Additionally, different classification systems exist for each major type of rock. There are three major types of rock: igneous rock, metamorphic rock, and sedimentary rock.
Title: Bridge Base Basic
Content:  following point ranges: ; 1 NT = 15 to 17 HCP ; 2 NT = 20 to 21 HCP ; 3 NT = 25 to 27 HCP ; Stayman and Jacoby transfer conventions for notrump openers ; Blackwood or Gerber for slam bidding. Like SAYC, BBO basic depends upon hand evaluation using the high card point (HCP) method. Hand shape adjustments are made for long suits (1 point additional for every card longer than 4 in a suit), when bidding a new suit, and for short suits when showing support for partners bid (5 for a void, 3 for a singleton, and 1 for a doubleton). Other similarities to SAYC include:
Title: Glossary of geology
Content:  banded iron formation: A distinctive type of rock often found in primordial sedimentary rocks. basalt: A fine-grained, mafic igneous rock composed predominantly of ferromagnesian minerals and with lesser amounts of calcium-rich feldspar. basement rock: The thick foundation of ancient, and oldest metamorphic and igneous rock that forms the crust of continents, often in the form of granite. basic rock: Igneous rock with low silica content (<54%). The groups ultrabasic, basic, intermediate and acid constitute a series with progressively increasing SiO2 content. basin: A landform scooped out by water erosion. Basin and Range Province: A particular covering much of the southwestern United States and northwestern Mexico that is typified by elongate north-south 
Title: Rock (geology)
Content:  structure, metamorphic rocks are divided into two general categories. Those that possess a texture are referred to as foliated; the remainders are termed non-foliated. The name of the rock is then determined based on the types of minerals present. Schists are foliated rocks that are primarily composed of lamellar minerals such as micas. A gneiss has visible bands of differing lightness, with a common example being the granite gneiss. Other varieties of foliated rock include slates, phyllites, and mylonite. Familiar examples of non-foliated metamorphic rocks include marble, soapstone, and serpentine. This branch contains quartzite—a metamorphosed form of sandstone—and hornfels.
Title: List of mountain types
Content: Igneous ; Extrusive (see types of volcanoes, above) ; Intrusive ; Metamorphic ; Sedimentary 
Title: Yoshizawa–Randlett system
Content: A blintz base is made by folding the corners of a square into the center, similar to the blintz pancake. The resulting square can then be used as the starting point for any base or blintzed again. The resulting base will then have more points available for folding. ; The kite base is merely two valley folds that bring two adjacent edges of the square together to lie on the square's diagonal. ; The fish base consists of two radial folds against a diagonal reference crease on each of two opposite corners. The flaps that result on the other two corners are carefully folded downwards in the same direction. 
Title: Structural basin
Content: Amadeus Basin ; Bowen Basin ; Cooper Basin ; Galilee Basin ; Great Artesian Basin 
Title: Base Band 5
Content:  Base Band 5, abbreviated as BB5, is the current mobile baseband generation implemented on Nokia mobile phones and the replacement for prior DCT (Digital Core Technology) generations. This generation of Nokia phone basebands uses a new range of chipsets, bus systems and components as well as enhanced security mechanisms preventing manipulations of firmware and system configurations. The phones' system interface has changed over from previous generations to allow, for instance, flashing of the device via USB.

Question: what are the 4 types of nitrogenous bases?
Answer: cytosine (C).
adenine (A).
uracil (U).
thymine (T).
guanine (G).