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From Our Gallery
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 104
Miller's Experiment
 1125
Mono Lisa
 259
Primate skin
 96
Checkpoint Genes in Action
 402
James Watson and Francis Crick’s metal-and wire model of DNA
 266
Tree Rings: Pine
 941
Phobos in color by Mars Reconnaissance Orbiter - HiRISE
 16986
Diagram of the life cycle of Plasmodium falciparum, the causative agent of malaria
 11699
Hormonal control of parturition.
 230
Wasp in Amber
 143
Electron micrograph of Euglena gracilis
 75024
Generalized flower structure.
 27503
An example of color blindness test. A person with red-green color blindness would not be able to dis
 607
Water-conserving structures in a transverse section of pincushion leaf (Hakea laurina)
 309
Body plan of a tomato plant
 338
Number of cells in the brain
 302
Anatomy of a eudicot leaf
 375
Location and organization of the spinal cord
 261
Mammalian Teeth
 580
Structure of a woody stem
 4408
A comparison of the proteomes in human liver and skeletal muscle cells
 84
Bacteriophages
 1407
Hemoglobin
 139
Sympatric Speciation in Wheat
 211
The Major Plant Groups
 260
Epicatechin
 230
Karenia brevis
 300
Development of the Dungeness crab (Cancer magister). The crabs live for 8 to 10 years.
 236
Structure of a flight feather
 312
Use of Flight Muscles
 247
The last captive quagga
 4011
A treatment for blocked blood vessels.
 770
A zebra orchid (Caladenia cairnsiana) mimics the scent of a female wasp
 6203
Tooth Anatomy
 356
Cocaine’s Effect on the Brain
 111
Outline of Meiosis II
 259
Hydrozoan
 517
Imaginal disks in the development of Drosophila
 361
Action Potential Membrane Potential
 269
Salt grains up close
 482
A model of the 70 ribosome, with mRNA and tRNA bound
 5954
A large female tiger shark (Galeocerdo cuvier)
 401
The brains of animals of different evolutionary ages
 271
Adaptive Immunity
 520
Ethylene Production During Strawberry Ripening
 313
The large, white flowers of giant saguaro cactus (Carnegiea gigantea) produce sweet nectar. The flow
 6773
Body plan of an echinoderm, as represented by a sea star.
 268
Cephalopod: Chambered Nautilus
 225
Fruit Development
 13348
Examples of sensory receptors in the skin of mammals.
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Calculating the Interest Rate in an Annuity (Using Excel)
Handling Partial Periods with Drop and Balloon Payments #finance #annuities
Future Value of Compound Interest Formula (How it Works and its Derivation)
Solving for the Number of Periods in an Annuity
Grade 6 Math Challenge: Average Speed 95% Get This Wrong!
Deriving the Geometric Series Sum Formula
Solving Promissory Note Problems - Calculating Discounting Time
Treasury Bill Calculations (T-bills)
Calculating Present Value of Annuity Due
Finance Trick to Paying off Your Mortgage Faster
Ordinary Simple Annuity Formula (How it Works and its Derivation)
Cavalieri's Indivisibles and the Area of a Circle
Calculating Real After Tax Interest Rate
Discount Loans Explained (when interest is paid upfront)
When in Rome (a tutorial on Roman numerals)
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.
When playing tic-tac-toe, young children sometimes miss the need to place a mark (i.e., X or O) to block their opponent from winning. Instead, they choose to place an offensive mark that gets them closer to having three marks in a row. This approach...
Quiz Me
A 0.700 g sample containing Ag2O and inert material is heated, causing the silver oxide to decompose according to the following equation:

2 Ag2O(s) → 4 Ag(s) + O2(g)

If 13.8 mL of gas are collected over water at 27°C and 1.00...
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You have just written a paper-pencil quiz for a unit on map-reading skills. Following the textbook's advice, you arrange the items by:
A) putting more difficult items, as well as those that require considerable thought, at the beginning of...
Quiz Me
Answer the question about the Law of Large Numbers.

Jim has been stopped for speeding three times in the last year, but each time was given a warning instead of a ticket. What does it mean to say...
Quiz Me
Suppose coffee prices, gasoline prices, and concert ticket prices are all sharply higher this year compared to last year. The economy is experiencing
A) disinflation.
B) deflation.
C) inflation.
D) possibly A, B, or C above.
Quiz Me
Which of the following descriptions is most consistent with a sociocultural view of motivation?
A) Students are motivated by the need to receive rewards and avoid punishers.
B) A positive learning environment provides motivational...
Quiz Me
Compared to Freud’s psychoanalytic view, the humanistic view of human nature is ________; it emphasizes ________. 
a. negative; free will
b. positive; determinism
c. negative; determinism
d. positive; free will
Quiz Me
Governments establish propulsive industries to promote
A) regional economic development.
B) economic growth in existing manufacturing centers.
C) primary sector growth.
D) local health, education and welfare.
Quiz Me
To qualify for Subchapter S treatment under the Internal Revenue Code, a domestic corporation must have ________.
A) membership in an affiliated group of corporations
B) more than 35 shareholders
C) only one class of stock...
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Fundamentally, postmodernism may be understood as ________.
A) a celebration of Western culture
B) a rejection of Western cultural supremacy
C) an emphasis on rationality and science
D) an emphasis on Christianity
Quiz Me
Which of the following statements regarding recidivism among juvenile delinquents is FALSE?
a. Recidivists have less difficulty adjusting to their prosocial peers than do nonrecidivists.
b. Recidivists are more likely than nonrecidivists to...
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The management of Crosson Corporation is investigating the purchase of a new satellite routing system with a useful life of 9 years. The company uses a discount rate of 17% in its capital budgeting. The net present value of the investment,...
Quiz Me
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