The main force that moves blood throughout the system of blood vessels is ____

a. arterial blood pressure
b. skeletal muscle action
c. smooth muscle action
d. valve action
e. venous blood pressure


ANSWER: a

Biology & Microbiology

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Antibody-mediated immune responses produced by specific proteins are generated by:

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The apparent lack of intermediate forms in the fossil record can be explained by the ____ hypothesis

a. disruptive selection b. fossil decay c. punctuated equilibrium d. genetic drift e. allopatric speciation

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The short, numerous appendages used by some bacterial cells for adhering to surfaces are called ________.

A. flagella B. pili C. fimbriae D. cilia E. periplasmic flagella (axial filaments)

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Lastly, structures composed entirely of connective tissue and commonly found in joints, are examples o

What will be an ideal response?

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