In the earthworm, the typhlosole
a. Is the organ of locomotion
b. Increases the absorptive area of the gut
c. Grinds the food
d. Produces secretions during mating
e. Coordinates the contractions of the digestive system
Answer: b. Increases the absorptive area of the gut
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The _____ include the only winged invertebrates
a. cnidarians c. arthropods b. echinoderms d. placozoans
Effector B cells
a. secrete antibodies identical to those of the original B cell from which they arose. b. secrete antibodies that are different than the original B cell from which they arose. c. present bound antibodies identical to those of the original B cell from which they arose. d. present bound antibodies different than those of the original B cell from which they arose. e. secrete cytokines
Answer the following questions true (T) or false (F)
1. Cells harvest energy from nutrients by stripping electrons from them. In other words, the nutrients are oxidized. 2. By the end of the Krebs cycle, every carbon originally in glucose is converted into carbon dioxide. 3. The main energy benefit of the Krebs cycle is the mass production of both ATP and the reduced factors NADH and FADH2.
nonpolar covalent bond
What will be an ideal response?