The birds that are most highly adapted to marine life are the:

a. tubenoses.
b. gulls.
c. penguins.
d. pelicans.
e. sandpipers.


C

Biology & Microbiology

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How do the secreted antibodies from a plasma cell differ from the cell-surface antibodies of a memory cell?

A. in the specificity of the hypervariable domain B. by the absence of a hydrophobic domain in the constant region C. through the removal of the constant region D. by the absence of a hydrophilic domain in the constant region

Biology & Microbiology

Which of the following equations represents the total water potential of a plant?  

A.  s2 + p2 = w2 B.  ?s = ?p + ?w C.  ?p = ?w + ?s D.  ?w = ?p + ?s E.  ?w = ?p - ?s

Biology & Microbiology

If the pH gradient in a two-dimensional gel is lost, which step during two-dimensional electrophoresis would be affected?

What will be an ideal response?

Biology & Microbiology

For an XX female to express a recessive sex-linked trait, she must have

A.) a Y chromosome B.) an inactivated allele C.) two dominant alleles D.) two recessive alleles

Biology & Microbiology