Image
from article Circle
A circle, with radius, diameter, and circumference indicated. (Credit: McGraw-Hill Education)
Search Results
Search Results
Refine this search
Search result paging links
2,129 results
Image
from article Circle
Nine-point circle and Euler line PMH.
Image
from article Sonobuoy
Launch of a sonobuoy from an antisubmarine warfare (ASW) aircraft. (a) In flight. (b) Buoy strikes the water in a nearly vertical attitude. (c) Antenna and hydrophone are positioned automatically.
Image
from article Trihedron
Trihedron and trihedral angles.
Image
from article Trihedron
Spherical triangle ABC formed by intersection of sphere with a trihedron. The center of the sphere is at the vertex of the trihedron.
Image
from article Gamma function
Depiction of gamma function Γ(z) for real values of z.
Image
from article Human ecology
Shacks and garbage along a dirty river in a slum in Manila, Philippines. Human ecology encompasses how individual people and their communities interact with their particular environment. In many cases, though, humans have created polluted…
Image
from article Human ecology
Burning of a tropical rainforest in Brazil in order to clear land for animal grazing. (Credit: Barry Barker; copyright © McGraw Hill)
Image
from article Astrapotheria
Skeleton of Astrapotherium magnum. The genus Astrapotherium is known from the late Oligocene to the late Miocene.
Image
from article Lycopsida
Lycopodium clavatum, a representative homosporous lycopsid. (a) Sporophyte showing typical rhizomatous growth and paired cones. (b) Microphyllous leaf. (c) Sporophyll bearing a sporangium on the upper surface. (From K. R. Sporne, The Morphology of…
Image
from article Marsupialia
Skull and jaws of marsupials. (a) Didelphidae, Didelphis (the carnivorous opossum of North America), Recent, with polyprotodont incisors (I 5/4). (b) Phalangeridae, Trichosurus (the herbivorous opossum of Australia), Recent, with diprotodont…
Image
from article Marsupialia
Views of the soles of the left hindfoot of marsupials. (a) Didelphidae, Didelphis, representing the five-toed, polydactylous condition. (b) Phalangeridae, Trichosurus, representing the five-toed, syndactylous condition (digits II and III are bound…
Image
from article Pholidota
Pangolin (genus Manis, order Pholidota). (Credit: Wildlife Alliance)
Image
from article Salmon
Salmon swimming in the Russian River, Alaska. (Credit: Ryan Hagerty/U.S. Fish and Wildlife Service)
Image
from article Salmon
Chinook salmon (Oncorhynchus tshawytscha). (Credit: National Estuarine Research Reserve System, National Marine Fisheries Service, National Oceanic and Atmospheric Administration)
Image
from article Hexactinellida
The dried siliceous skeleton of a glass sponge, Euplectella. (Credit: Randolph Femmer/United States Geological Survey)
Image
from article Hexactinellida
The class Hexactinellida includes living and fossil forms. Living hexactinellids: (a) Hyalonema (Cyliconema) thomsoni (order Amphidiscosida) and (b) Regadrella phoenix (order Lyssacinosida). Fossil hexactinellid: (c) Hydnoceras tuberosum (order…
Image
from article Hexactinellida
A fossil hexactinellid sponge, Hydnoceras bathense (order Reticulosa). (Credit: James St. John)
Image
from article Lagomorpha
Pika (Ochotona princeps). (Copyright © California Academy of Sciences)
Image
from article Fisheries ecology
The Atlantic bluefin tuna (Thunnus thynnus) is one of the world's most lucrative fish harvested by commercial fisheries. (Credit: Ugo Montaldo/Shutterstock)
Image
from article Fisheries ecology
Raceways (artificial channels used in the culturing of aquatic organisms) at Spring Creek National Fish Hatchery, Washington. (Credit: U.S. Fish and Wildlife Service)
Image
from article Fisheries ecology
Derelict fishing gear left in ocean waters can cause the needless deaths of millions of marine mammals, fish, birds, and invertebrates. (Credit: Joan Drinkwin/U.S. Fish and Wildlife Service)
Image
from article Salmon farming
Adult Atlantic salmon (Salmo salar). (Credit: William Hartley/U.S. Fish and Wildlife Service)
Image
from article Salmon farming
Atlantic salmon (Salmo salar) at a pre-smolt stage. (Credit: Edward Peter Steenstra/U.S. Fish and Wildlife Service)
Image
from article Salmon farming
A congregation of coho salmon (Oncorhynchus kisutch) released from a hatchery. Investigators continue to study the effects of farmed fish on neighboring populations of wild salmonids. (Credit: Salmon Ecology Team/Southwest Fisheries Science Center,…
Image
from article Halimeda
Halimeda kanaloana found in the waters off Hawaii. (Photo courtesy of the Deep Water Macroalgal Meadows 2004 Exploration, Office of Ocean Exploration, National Oceanic and Atmospheric Administration)
Image
from article Stenurida
Stenurida. (a) Ventral view of an arm and mouth frame plates of Bdellacoma vermiformis, a stenurid with long, slender arms. (b) Stenaster obtusus, a stenurid with short, broad arms. (After W. K. Spencer and C. W. Wright, Asterozoans, in R. C. Moore,…
Image
from article Hypergeometric functions
Image
from article Sarcopterygii
Marbled or speckle-bellied lungfish (Protopterus aethiopicus). This African lungfish, a member of the class Sarcopterygii, can reach up to 2 m (6.6 ft) in length. (Photo by Joel Abroad)
Image
from article Grassland ecosystem
Grasslands cover the Great Plains region in North America, extending from southern Texas into Canada. (Credit: U.S. Forest Service)
Image
from article Grassland ecosystem
Map of grassland types in central and western North America. (Copyright © McGraw Hill)
Image
from article Xiphosurida
Segmentation of Limulus polyphemus. Inconclusive evidence indicates that there are 15 segments (6 in the prosoma, 9 in the opisthosoma). The telson (XV) may be a terminal spine that has become articulated and has incorporated the anus into its base.…
Image
from article Xiphosurida
Phylogeny and representative species of the order Xiphosura, including the suborder Xiphosurida and its sister group, synziphosurines (a paraphyletic stem group). (Copyright © McGraw Hill)
Image
from article Xiphosurida
Paleolimulus signatus, a limuline xiphosurid from the Permian of Kansas, showing appendages and book gills. Length of specimen: 1.25 cm (0.5 in.). (Copyright © McGraw Hill)
Image
from article Xiphosurida
Carapaces of adult male horseshoe crabs: (a) Limulus polyphemus; (b) Tachypleus tridentatus; (c) Carcinoscorpius rotundicauda. (Copyright © McGraw Hill)
Image
from article Xiphosurida
Embryonic and larval development of Limulus polyphemus. (a) Early embryo, side view. (b) Late embryo. (c) Yolk-filled digestive tract of larva. Note the segmentation of yolk in the newly hatched stage and the six lobes of digestive gland. (d) First…
Image
from article Xiphosurida
Morphology of adult male Limulus polyphemus. (a) Dorsal view. (b) Ventral view, appendages not shown. (c) Cross section through prosoma showing internal anatomy. (d) Posterior view. (e) Lateral view. (Copyright © McGraw Hill)
Image
from article Slope
Slope of a line.
Image
from article Slope
Slope of a curve.
Image
from article Water conservation
Drying lake because of drought. (Credit: Tim McCabe/USDA Natural Resources Conservation Service)
Image
from article Temnospondyli
Common Permian temnospondyl Eryops; length is approximately 6 ft (2 m). (After American Museum of Natural History)
Image
from article Mammoth
Skeleton of a mammoth (genus Mammuthus). (Credit: Beatrissa/Shutterstock)
Image
from article Mammoth
Photograph of the grinding surfaces of a molar tooth of an adult Mammuthus columbi (main image) and a tooth from a baby mammoth (lower-left image). Cross ridges of enamel show various stages of wear, with dentine in the middle of each pair of…
Image
from article Mammoth
View of a sculpture of a mammoth at the La Brea Tar Pits and Museum in Los Angeles, California. (Credit: Zack Frank/Shutterstock)
Image
from article Mammoth
Pictographs of a mammoth and a bison at a site along the San Juan River in Utah: (top) photo without enhancement; (bottom) labeled photo with colorized mammoth and bison. (Credit: Ekkehart Malotki)
Image
from article Piltdown man
Three views of the reconstructed skull of Piltdown. The original preserved portions are shown as dark areas. The light portions are reconstructed only.
Image
from article Population dispersion
Uniform distribution of a mature population of creosote bushes (Larrea tridentata). (Credit: Evelyn Jo Johnson)
Image
from article Population dispersion
Basic patterns of the dispersion of individuals in a population: (left) random; (middle) uniform; (right) clumped (but groups are random). (Copyright © McGraw Hill)
Image
from article Pseudoscorpionida
An unidentified pseudoscorpion species of the family Atemnidae. (Photo copyright © Gonzalo Giribet)
Image
from article Pseudoscorpionida
Synsphyronus apimelus, a pseudoscorpion belonging to the family Garypidae. (Photo copyright © Gonzalo Giribet)
Image
from article Pseudoscorpionida
Pseudoscorpion morphology. (a) Adult, in two views. (b) Chelicera of a male pseudoscorpion. (Illustration based on an original by H. S. Pratt)
Image
from article Orthida
Orthida: (a) dorsal, (b) ventral, (c) posterior, and (d) anterior views of Platystrophia, Ordovician; (e) diversity history of orthid families. (a–d after R. C. Moore, C. G. Lalicker, and A. G. Fischer, Invertebrate Fossils, McGraw-Hill, New York,…
Image
from article Bioinformatics
Bioinformatics (indicated by the star in the diagram) is a scientific discipline that combines biology, mathematics, and computer science. It applies the power of computer processing to the study of biological systems. (Copyright © McGraw Hill)
Image
from article Bioinformatics
The central dogma of molecular biology explains how genetic material is transcribed into RNA, which is translated into proteins; then, proteins function to create metabolites, which affect the phenotypes of cells, tissues, and organisms. Scientists…
Image
from article Finite element method
Illustration of a Von Mises stress plot for the bending of an I-beam. The finite element method can be used to investigate these stresses. (Credit: Shutterstock / Mathew Alexander)
Image
from article Finite element method
Structures modeled by fitting together structural elements: (a) truss structure; (b) two-dimensional planar structure.
Image
from article Finite element method
Element types: (a) bar; (b) beam; (c) membrane elements; (d) solid elements; (e) axisymmetric solid; (f) plate-bending elements; (g) curved-shell elements; (h) axisymmetric thin-shell element.
Image
from article Finite element method
Finite element method of (a) fuselage section and (b) wing of a business jet.
Image
from article Conifer
A mixed conifer forest primarily composed of western white pine and mountain hemlock surrounding Cliff Lake, Lassen Volcanic National Park, California. (Credit: Amanda Sweeney/National Park Service)
Image
from article Conifer
Conifers dominate the boreal forests (taigas) of Denali National Park and Preserve in Alaska. (Credit: Holly Hildreth; copyright © McGraw Hill)
Image
from article Conifer
Conifer seed cone structure. (a) Pine cone consisting of seed scales attached to the cone axis immediately above the bracts. One scale is bent back to reveal two seeds attached to the upper surface. (b) Fertile shoot from above a bract in an Emporia…
Image
from article Euclidean geometry
The Greek mathematician Euclid. (Credit: ZU_09/E+/Getty Images)
Image
from article Euclidean geometry
Basic objects in mathematics from left to right: a point, a line, and a ray. (Credit: Christopher Thomas)
Image
from article Euclidean geometry
A sketch of two parallel lines, l and m. (Credit: Christopher Thomas)
Image
from article Euclidean geometry
Two similar triangles, which have different sizes but the same angles. (Credit: Christopher Thomas)
Image
from article Euclidean geometry
Representation of statements that are true in Euclidean geometry. (5a) A circle with radius r and a circumference (C) of 2πr and area (A) of πr2. (5b) One line through point p when p is not on line l will form a parallel line to line l. (Credit:…
Image
from article Euclidean geometry
A right triangle with sides A, B, and C. Knowing any two of the lengths of the three sides can be used to find the length of the third side using the Pythagorean theorem. (Credit: Christopher Thomas)
Image
from article Cyclostomatida
Cyclostome zooids (order Cyclostomatida) with tentacles retracted versus extended. (Reprinted with permission from R. J. Cuffey and J. E. Utgaard, Bryozoans, pp. 201–216, in R. Singer, ed., Encyclopedia of Paleontology, Vol. 1, 2d ed., Fitzroy…
Image
from article Xenungulata
Molars of Carodnia vieirai from the Paleocene of Brazil: (a) upper and (b) lower.
Image
from article Porifera
The giant barrel sponge (Xestospongia muta) is often found growing on Caribbean coral reefs. This type of marine sponge, which belongs to the class Demospongiae, has been known to grow to more than 1.8 m (6 ft) in diameter. (Credit: National Oceanic…
Image
from article Porifera
The azure vase (chalice) sponge (Callyspongia plicifera) is a type of demosponge, producing monaxonic or tetraxonic silica spicules and/or spongin. (Credit: Diane R. Nelson)
Image
from article Porifera
Diagram of the canal system of a young freshwater sponge. (Copyright © McGraw-Hill Education)
Image
from article Porifera
Cell types found in a freshwater sponge as seen in a cross section through the interior of the sponge. (Copyright © McGraw-Hill Education)
Image
from article Porifera
Diagram of a flagellated chamber of a freshwater sponge. The chamber is shown in optical section, and the exhalant canal is shown in three dimensions. (Copyright © McGraw-Hill Education)
Image
from article Porifera
Spicule types. Monaxons: (a) monactinal; (b) diactinal. Tetraxons: (c) equirayed; (d) triaene. (e) Triradiate. (f) Triaxon or hexactine. (g) Microscleres. (Copyright © McGraw-Hill Education)
Image
from article Porifera
Carrier cell transmitting sperm to egg in a calcareous sponge. (Copyright © McGraw-Hill Education)
Image
from article Porifera
Sponge gemmules (asexual reproductive bodies): (a) freshwater sponge gemmules in optical section; (b) marine siliceous sponge gemmules (surface view). (Copyright © McGraw-Hill Education)
Image
from article Porifera
Zoanthids living in a sponge. (Copyright © McGraw-Hill Education)
Image
from article Porifera
A fossilized early sponge. (Credit: Yinan Chen)
Image
from article Spongiomorphida
Spongiomorpha acyclica (Triassic, Austria), length = 8 cm. (From J. P. Smith, Upper Triassic marine invertebrate faunas of North America: Spongiomorphs, U.S. Geol. Surv. Prof. Pap., 1927)
Image
from article Protective coloration
The protective coloration of a hawk moth resembles the color pattern of the bark of a tree, helping to camouflage the animal from predators. (Credit: Wilm Ihlenfeld/Shutterstock)
Image
from article Protective coloration
A mountain hare (Lepus timidus) with white fur sitting in snow in winter. (Credit: Peter Wey/Shutterstock)
Image
from article Protective coloration
The coloration of a pygmy sea horse resembles that of the soft coral, fooling predators of the sea horse. (Credit: Stephen Frink/Image Source)
Image
from article Octopoda
An octopod swimming in the ocean. (Credit: Getty Images/iStockphoto)
Image
from article Octopoda
Hapalochlaena maculosa, the Southern or lesser blue-ringed octopus, has vivid, small blue rings on its body and arms, highlighted with black outlines. Location: Mrs. Watson's Bay, Lizard Island, Great Barrier Reef, Australia. (Credit: Clyde F. E.…
Image
from article Octopoda
Hapalochlaena fasciata, the blue-lined octopus, has vivid blue lines on its body and rings on its arms, highlighted with black outlines. Location: Long Reef, New South Wales, Australia. (Credit: Clyde F. E. Roper)
Image
from article Octopoda
Lateral view of a female Argonauta (family Argonautidae). (Copyright © McGraw Hill)
Image
from article Polyplacophora
Chiton on a rock surface. (Photo courtesy of the NOAA Okeanos Explorer Program, National Oceanic and Atmospheric Administration)
Image
from article Polyplacophora
Polyplacophoran mollusk (chiton): (a) dorsal view; (b) ventral view.
Image
from article Trace fossils
Domichnial dwelling burrow with pelleted wall, probably created by a burrowing crustacean. Ophiomorpha, Cretaceous, North Dakota. (From W. Häntzschel, in C. Teichert, ed., Treatise on Invertebrate Paleontology, pt. W, revised, University of Kansas…
Image
from article Trace fossils
Highly branched, fodinichnial mining burrow, possibly produced by a deposit-feeding crustacean or worm. (a) Chondrites, Tertiary, Austria. (b) Chondrites, Tertiary, Spain. (From W. Häntzschel, in C. Teichert, ed., Treatise on Invertebrate…
Image
from article Trace fossils
Agrichnial farming trace of an unknown organism, composed of a hexagonal, meshlike network of tunnels. Paleodictyon, Tertiary, Poland. (Photograph by W. Häntzschel)
Image
from article Trace fossils
Agrichnial farming traces of unknown organisms, including a double-spiral tunnel (Spirorhaphe) and a meshlike network of tunnels (Paleodictyon). Tertiary, Austria. (Photograph by W. Häntzschel)
Image
from article Trace fossils
Loosely meandering, agrichnial farming trace of an unknown organism. Cosmorhaphe, Tertiary, Poland. (From W. Häntzschel, in C. Teichert, ed., Treatise on Invertebrate Paleontology, pt. W, revised, University of Kansas Press, 1975)
Image
from article Trace fossils
Praedichnial boring drilled in a bivalve shell by a carnivorous gastropod. Oichnus, Recent, Texas. (Photograph by A. A. Ekdale)
Image
from article Trace fossils
Tightly meandering, pascichnial grazing trail, created by an unknown worm. Helminthoida, Tertiary, Austria. (From W. Häntzschel, in C. Teichert, ed., Treatise on Invertebrate Paleontology, pt. W, revised, University of Kansas Press, 1975)
Image
from article Trace fossils
Repichnial trail of an arthropod, possibly a trilobite. Cruziana, Cambrian, Alberta. (Photograph by J. P. A. Magwood)
Image
from article Trace fossils
Unnamed escape structure (fugichnial trace) in sandstone. Cretaceous, Utah. (Photograph by A. A. Ekdale)
Image
from article Trace fossils
Cubichnial resting trace of an ophiuroid brittle star. Asteriacites, Jurassic, Germany. (Photograph by W. Häntzschel)
Image
from article Trace fossils
Complex, composite ichnofabric created by numerous successive phases of burrowing in a fine-grained pelagic carbonate deposit, which has been weakly cemented to become chalk. Upper Cretaceous, Denmark. (Photograph by A. A. Ekdale and R. G. Bromley)
