Which statement about diffusion is correct?
A) Diffusion causes movement of materials toward equilibrium.
B) Diffusion of water cannot occur.
C) Diffusion can occur only through a membrane.
D) Diffusion requires a protein channel.
Answer: A
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Indicate whether the statement is true or false
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a. triglycerides. b. polysaccharides and nucleic acids. c. nucleic acids. d. polypeptides. e. triglycerides and phospholipids.
Affixing antigen to an inert particle such as a latex bead is sometimes used in which type of test?
A.) cross-reactions B.) agglutination C.) precipitation D.) specificity E.) sensitivity
The archenteron of a frog develops into the _____
A) blastocoel B) endoderm C) placenta D) lumen of the digestive tract