Serial repetition of segments is a defining characteristic of which worm phylum?
A) Flatworms
B) Annelids
C) Roundworms
D) Segmentation is not a defining characteristic of any of the worm phyla.
B
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In competitive inhibition
a. the products of the reaction block the active site of the enzyme. b. the products of the reaction bind to a site other than the active site of the enzyme and block enzyme activity indirectly. c. the substrate and cofactors compete for the active site. d. the inhibitor binds to and directly blocks the active site of the enzyme. e. the inhibitor binds to an enzyme at a site other than its active site.
In an Hfr × F? mating, the conjugation bridge usually breaks before chromosomal transfer is complete. Therefore, the recipient remains F?.
Answer the following statement true (T) or false (F)
Which of the following occurs during the Calvin cycle of photosynthesis?
A) Chlorophyll acts as an enzyme, but only in the dark. B) Carbon dioxide is converted to chemicals that can be used to make sugars. C) Nothing occurs because the plant rests in the dark. D) Water is converted to its most basic elements, hydrogen and water.
A decrease in blood glucose from skipping a meal will cause the ____ to secrete glucagon, which will cause the ____ to break down glycogen into glucose.
A. liver; pancreas B. pancreas; gall bladder C. spleen; pancreas D. pancreas; spleen E. pancreas; liver