This animal has two atria and two ventricles and two vascular circuits. This animal is a(n) ____
a. mountain bluebird
b. fire-bellied toad
c. trout
d. lobster
e. cod
ANSWER: a
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The following organisms can incorporate nitrogen directly from the atmosphere into their bodies:
What will be an ideal response?
A diploid cell divides by a process called________ to produce haploid cells.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about lymphocytes is FALSE?
A. Once they are mature, they migrate to secondary lymphoid organs. B. B and T lymphocytes can be differentiated using a bright-field light microscope. C. Lymphocytes have integral surface proteins by which they can be recognized. D. The glycoproteins on the surface of a lymphocyte are designated with the prefix CD, for "cluster of differentiation." E. Lymphocytes have different types of CD molecules in their cytoplasmic membranes.
What is the difference between strong and weak acids?
What will be an ideal response?