Internal validity is the degree to which the results are attributable to the independent variable and not some other explanations.External validity is the extent to which the results of a study can be generalized.
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Three key features that distinguish them from most amphibians is that they have an amniotic egg, internal fertilization, and they have internal fertilization.
Compare and contrast it with what?
When you can not contrast or compare.
External respiration is the exchange if oxygen and carbon dioxide between the blood and air in the lungs, and internal resparation is the exchange of gases between blood cells of the body.
1. Compare 2. Contrast
Lizards have external parts. I.E. legs. They also have eyelids. Snakes have no legs, no external part, and no eyelids, but they both have scaly skin.
Well, there has to be some purpose :] In a compare and contrast essay you compare and contrast the different aspects of a topic!
compare is when you compare two things that are the same and contrast is when you compare two things that are different.
Compare and contrast HTTP and XML?
Compare and contrast McGregor and Maslow
Compare and contrast NPV with IRR
Compare and contrast character of Jane
compare and contrast the lakes,wetland and rivers?
compare and contrast Pakistan and India religion
compare and contrast between triangles and a trapezoid
compare and contrast intracellular and extracellular
compare and contrast of paradise book 1 and book9
How can you compare and contrast psychodynamic and humanistic
compare & contrast the similarities & differences of a relation & function
compare and contrast theory of emotion
The answer depends on what you wish to compare and contrast it with.
Compare: Explain how two or more things are the same. Contrast : Explain how two or more things are different.