Which is false regarding passive transport?
a. It depends on concentration or electrical
gradients.
b. It involves weak binding between solute and
protein.
c. It requires an energy input.
d. It depends on protein shape change.
e. None of these are false.
Answer: c
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The fact that the ratio of human male to female births is nearly 1:1 demonstrates that
A. X and Y chromosomes demonstrate independent assortment. B. X and Y chromosomes demonstrate segregation and random fertilization. C. X and Y chromosomes are homologous. D. X and Y chromosomes determine sex. E. All of these choices are correct.
Of the taxonomic groups listed below, which is the broadest (contains the most species)?
A. Order B. Class C. Family D. Phylum E. Kingdom
The patterns of phenotypes an individual may develop upon exposure to different environments is called its ________
A) predictability norm B) variability norm C) response norm D) reaction norm
To get into the nucleus a component has to have the correct signal sequence and pass through a nuclear pore.
a. true b. false