Animals that have a fluid-filled cavity that separates the gut from the muscles of the body wall and

have that cavity completely lined by the peritoneum are said to be



a. pseudocoelomate.
b. mesenteries.
c. acoelomate.
d. indeterminate.
e. coelomate.


E

Biology & Microbiology

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When these enzymes bind to a restriction site, they cut the DNA molecule into two molecules. 

A. polymerases B. ligases C. restriction enzymes D. helicases

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Efficient propagation of action potential regulated by myelin sheets and Nodes of Ravier is known as (i)_______________.

a) (i) Saltatory conduction b) (i) EPSP c) (i) synaptic integration d) (i) summation

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Select the statement that most accurately describes the action of antimicrobial drugs today.

A. The development of antiviral drug resistance has not been observed, as compared to the high rate of antibiotic resistance seen today. B. Effective antiviral drugs have a long history of development and use. C. Antiviral drug treatment is more effective than vaccination against a viral disease. D. Antiviral drugs often result in toxic side effects due to their inhibition of host cell activity.

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Autoimmunity is typically due to

A. a deficiency in T-cell development. B. a transfusion reaction. C. graft rejection. D. IgE and mast cells. E. autoantibodies and T cells.

Biology & Microbiology