The density of cold water at great depths is
a. lower than surface waters.
b. similar to the surface waters.
c. higher than the surface waters.
d. always the same throughout the water column.
e. variable, depending on latitude.
C
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What is a cirucmcision?
A) The surgical removal of the uterous B) The surgical sterilization of a male by cutting the vas deferens C) The surface removal of the foreskin of the penis D) The surgical sterilization of a female by blocking the oviducts
An _______ is a general term for a substance that stimulates an immune response.
A. IgE B. antigen C. histamine D. interferon
The body of a bilaterally symmetrical animal can divided into two equivalent halves by more than one plane
____________________ Indicate whether the statement is true or false.