The difference between simple diffusion and facilitated diffusion is that facilitated diffusion
A) Can move materials from a higher to a lower concentration.
B) Can move materials from a lower to a higher concentration.
C) Requires ATP.
D) Requires transporter proteins.
E) Doesn't require ATP.
Answer : D) Requires transporter proteins.
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Which tissue type, or organ, is NOT correctly matched with its germ layer tissue?
A) nervous â€" mesoderm B) muscular â€" mesoderm C) stomach â€" endoderm D) skin â€" ectoderm E) skeletal â€" mesoderm
The total cross-sectional area is greatest in which blood vessels?
A) venules B) arteries C) arterioles D) veins E) capillaries
Which type of proteins is embedded in the cell membrane in both active transport and facilitated transport?
A. structural B. targeted C. carrier D. cytoskeletal
The most common mechanism for sympatric speciation in plants is
A. geographic isolation. B. punctuated equilibrium. C. disruptive selection. D. polyploidy. E. spontaneous mutation.