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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.
 286
Side view of a jumping spider making a leap
 489
Enceladus
 119
Eucalyptus robusta
 5634
Different Types of Cells
 411
Leaves of sugar maples (Acer saccharum)
 141
Embryonic development of shepherd’s purse (Capsella), a eudicot
 15367
The alimentary canal of birds.
 6001
Negative feedback as a mechanism by which homeostatic control systems operate.
 8496
Stages of transcription
 107
Lichen Structure
 367
A model of the 70 ribosome, with mRNA and tRNA bound
 96
Portuguese man-of-war (Physalia), a colony of scyphozoans
 5100
Ancient Warming Shrunk Horses to Housecat Size
 10856
Examples of epithelial tissue.
 5894
Testing the reducing atmosphere hypothesis for the origin of life - the Miller and Urey experiment.
 12
Asexual Reproduction
 64
Amoeba, a single-celled heterotroph
 448
Hypersensitive Response
 565
A zebra orchid (Caladenia cairnsiana) mimics the scent of a female wasp
 63
Bladderwrack (Fucus vesiculosus)
 4332
Variation in shape and length of nerve cells.
 8
Oligodendrocytes
 4104
Changes in metabolic rate of selected structures in a mammal's body during different activities
 16813
Diagram of the life cycle of Plasmodium falciparum, the causative agent of malaria
 375
A fly on a Venus Flytrap plant.
 3638
Nuclear medicine. Bone scan produced after injection of a radioactive substance into the body.
 27221
An example of color blindness test. A person with red-green color blindness would not be able to dis
 144
Structure of a flight feather
 218
Taste receptors in the human tongue
 45
Plasmodium, a protist pathogen that causes malaria
 186
Anatomy of a seed. Left, corn (Zea Mays), a monocot; right, pea (Pisum sativum), a eudicot
 194
Xylem vessels
 130
Mammalian Teeth
 178
A bird's skeleton
 196
Action Potential Membrane Potential
 170
Main components of the human endocrine system and the effects of their secretions
 159
Root uptake of soil water
 774
Cat Flea
 56
Characteristics of Some Protist Groups
 175
Salt grains up close
 52
Volvox
 5797
A large female tiger shark (Galeocerdo cuvier)
 57
Sketch of Euglena gracilis
 114
American Toad
 177
Paramecium
 183
Photo of a lancelet
 191
The periodic table and its creator, Dmitry Mendeleyev.
 545
Our Moon
 155
James Watson and Francis Crick’s metal-and wire model of DNA
 1021
The Structures of the Retina
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Integrated Trade Discount Problems (Markup, Markdown, Overhead)
Exploring Right Triangles: Labelling and Trigonometric Functions
Single Trade Discount: Finding Net and List Price Examples
Calculations Involving Spray Applicators
Pesticide Calculations in Horticulture (More Examples)
Pesticide Calculations in Horticulture
Calculating Deferred Annuities (Example 2)
Finding the Lowest Common Multiple Using Prime Numbers
A Step-by-Step Guide to the Trapezoidal Rule for Area Approximation
Profit vs. Contracts Sold: How Quadratics are Used in Business
Offset Method: Step-by-step Area Calculation Approach
Solving by Elimination: Systems of Linear Equations with Two Variables
Perpetuity and Annuities
Calculating Accumulated Value of an Annuity Due
Calculating Ordinary Annuity Due
Online Flashcards
Study, learn, and test youself  Whether you want to memorize every bone in the body or prepare for the upcoming MCAT, our web-based flashcard maker has you covered.
An effective means to persuade an audience is with ________ appeals.
A) illogical
B) unemotional
C) demonstrative
D) credibility
Quiz Me
You notice that Al is playing with an action figure that he has hidden in his desk. Students are not allowed to bring toys to school. Gathercoal would identify this as an issue of
 
  a. time.
  b. place.
  c....
Quiz Me
Ynez knows she cannot force her obnoxious downstairs neighbors to move out of the apartment complex. Rather than focusing on all the things she can't change, Ynez decides to spend more time with her friends on the other side of the complex, and to...
Quiz Me
Why do some Papua New Guinea societies prescribe male-to-male sexual acts?
 
  a. It is a way to prevent young men from becoming homosexuals.
 b. It is used to help men become more fertile and able to reproduce sons for...
Quiz Me
Konstantin is complaining to his friend, "I've got to make an A in Molecular Biology. If I don't get a top grade I'll be a failure to myself and a disgrace to my parents!" According to Carl Rogers, what is Konstantin applying to himself?
Quiz Me
Miranda interacts cordially, but infrequently, with her siblings. She's somewhat aware of their professions and personal interests but does not care to become involved with the details of their lives. Miranda's family type appears to be...
Quiz Me
Which best describes the surface of Callisto?
 
  a. dark and dirty ice, heavily pocked with craters
 b. old and dark on some portion, but cratered with a young bright grooved terrain
  c. icy crust free of...
Quiz Me
The half-life of 223Ra is 11.4 days. How much of a 200.0 mg sample remains after 600 hours?
A) 0.219 mg
B) .0302 mg
C) 6.04 mg
D) 43.8 mg
E) 21.9 mg
Quiz Me
A mutual fund paid 5.5%, 9%, -8%, 3.5% and 5% over the past five years. If you had invested $2000 at the beginning of the five-year period, what was your investment worth at the end of the five-year period? Calculate the result to the nearest...
Quiz Me
A mutual fund paid 3.5%, 4%, 3.5%, 6%, and 5% over the past five years. If you had invested $1000 at the beginning of the five-year period, what was your investment worth at the end of the five-year period? Calculate the result to the nearest...
Quiz Me
One of the greatest jazz musicians, this self-taught pianist grew up in Washington, D. C. After moving to New York, he established a band and they played for several years at the Cotton Club. Later his organization toured the world and made famous...
Quiz Me
During precortical processing of sensory input, some features of stimuli are accentuated and others are suppressed through ____.
 
  a. precortical filtering
  b. desensitization
  c. cortical damping
Quiz Me
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