Refer to the accompanying figure. Which two figures in the accompanying illustration represent inhalation steps of the
respiratory cycle?
a. 1 and 3
b. 1 and 2
c. 2 and 3
d. 2 and 4
e. 3 and 4
b
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The production of natural carbon dioxide by yeasts after a wine is bottled results in ________.
A. sweet wine B. brandy C. champagne D. dry wine
Annual growth rings are formed in woody stems
principally through the activity of the a. pericycle. b. pith. c. vascular cambium. d. mesophyll. e. endodermis.
HIV targets ______________ cells for infection
A. the helper T cells D. the red blood cells B. the cytotoxic T cells E. more than one of these C. the B cells
Which of the following is NOT a reaction pathway involved in the catabolism of arginine to generate ATP?
A. Arginine + H2O ? citrulline + NH3 B. Carbamyl-P + ADP ? ATP + CO2 + NH3 C. Citrulline + Pi ? ornithine + carbamyl-P D. Arginine + 3 H2O ? CO2 + 4 ATP