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From Our Gallery
Enhance your visual learning  Download and share pictures with your free membership.
What better way to learn than with access to over 35,000 diagrams, photos, and illustrations.
 4831
A closer look at the reproductive cycle of human immunodeficiency virus (HIV)
 630
Complete Lifecycle of a Frog
 770
Leaves of sugar maples (Acer saccharum)
 480
Primate skin
 11244
Examples of epithelial tissue.
 632
Photo of a lancelet
 5379
Ancient Warming Shrunk Horses to Housecat Size
 375
Morphological divergence among vertebrate forelimbs
 694
A model of the 70 ribosome, with mRNA and tRNA bound
 32800
A simplified food web from an African savannah ecosystem
 484
Portuguese man-of-war (Physalia), a colony of scyphozoans
 353
Time Line for Life’s Origin and Evolution
 600
Location and organization of the spinal cord
 525
Adult sponge, with a porous, asymmetrical body.
 482
Roundworm Body Plan
 551
Three Types of Neurons
 670
Body Plan of a Crocodile
 367
Characteristics of Some Protist Groups
 6081
Types of variation in chromosome number.
 473
Sympatric Speciation in Wheat
 362
Proportional Changes During Skull Development: Human vs. Chimpanzee
 669
A fly on a Venus Flytrap plant.
 1148
Phobos in color by Mars Reconnaissance Orbiter - HiRISE
 463
Inflammation
 461
Spore Bearing Structures of Pilobolus
 514
Use of Flight Muscles
 2116
Neoteny in Evolution of the Human Skull
 645
China has relied on cheap coal to meet its demand for energy
 540
Life cycle of the beef tapeworm (Taenia saginata).
 348
Genes on chromosomes
 275
Effects of Temperature on Gene Expression
 573
Side view of a jumping spider making a leap
 488
Mammalian Teeth
 581
Turtle Skelton
 906
Ethylene Production During Strawberry Ripening
 992
A zebra orchid (Caladenia cairnsiana) mimics the scent of a female wasp
 831
Water-conserving structures in a transverse section of pincushion leaf (Hakea laurina)
 332
Evolution of internal membranes
 418
Ascocarp: Scarlet Cup Fungus
 66
Exposure pathways
 629
Autonomic nerves and their effects
 95
The mercury cycle
 809
Indricotherium
 574716
Insect Spy Drone
 843
Cross-section of a human molar
 29414
The bronchial tree
 620
Dry outgrowths of the ovary wall of a maple (Acer) fruit form “wings” that catch the wind and ...
 6467
Tooth Anatomy
 174
Energy flow in the light-dependent reactions of photosynthesis
 71
Relationship of a DNA base sequence to peptide structure
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Square and Multiply Algorithm
Calculate the perimeter of the composite rectilinear shape #mathpuzzle
Man-in-the-Middle Attack on D-H Key Exchange
Reducing Ratios with Terms that are Decimals / Fractions
Diffie-Hellman Key Exchange Protocol (Step-by-Step) #cryptography
Reading a Tape Measure #trades
Solving a System of Linear Equations Graphically
Basic math - Long division with decimal numbers
Solve Basic Percent Change Problems
Solve Basic Percent Proportion Problems (Using BR = P)
Converting Between Fractions and Percentages with Repeating Decimals #basicmath #fractions
Solving Proportions by Cross-Multiplication #equations #fractions
Finding the Generators of Z*_7 #numbertheory #grouptheory
Merkle-Hellman Knapsack Algorithm Part 2: Encryption and Decryption #cryptography #algorithm
Merkle-Hellman Knapsack Algorithm Part 1: Generating the Public Key #cryptography #algorithm
Online Flashcards
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Pretend reading by a preschooler may not seem to families to be an important step toward real reading.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Quiz Me
Which of the following assessments carried out by the manager of a chain of used-car dealerships has the largest scope?
A) deciding how much inventory to carry in each dealership and the whole company
B) deciding on the appropriate number...
Quiz Me
A hypothesis test is performed to test the claim that a population proportion is greater than 0.7. Find the probability of a type II error, , given that the true value of the population proportion is 0.72.
  
  The...
Quiz Me
Because humans seek preservation and gratification, theorists call their behavior __________.
 
  Fill in the blank(s) with the appropriate word(s).
Quiz Me
Discuss Amir Nour’s work Grazing at Shendi (Fig. 29-1) in terms of form, iconography, and style.
Quiz Me
Kirsten Corporation makes 100,000 units per year of a part called a B345 gasket for use in one of its products. Data concerning the unit production costs of the B345 gasket follow:
Quiz Me
If the demand for some good fluctuates, but supply is constant, then which of the following combinations would generally yield the greatest price fluctuations?

▸ small demand fluctuations and elastic supply

▸ large demand...
Quiz Me
Which of the following statements is NOT a myth about alcohol abuse?
 
  a) Most alcoholics are homeless, skid-row bums.
  b) Mixing different kinds of alcoholic drinks can make a person drunk faster.
  c)...
Quiz Me
List and explain four modifications teachers use in Maker's Active Problem Solver Model.
Quiz Me
Which statement accurately describes the four types of communication contexts?

▸ Each one influences and is influenced by the others.

▸ They have little bearing on how messages are conveyed.

▸ They represent the...
Quiz Me
Willis was awakened from a sound sleep by a piercing scream coming from outside his bedroom window. Instantaneously his heart beat faster, his eyes widened, and his breathing quickened. These events characterized the __________ stage of the general...
Quiz Me
Who served as the principal model for cool-style saxophonists Stan Getz and Paul Desmond?
 
  a. Coleman Hawkins
 b. Charlie Parker
 c. Lester Young
 d. Dexter Gordon
Quiz Me
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